As other commenters here have noted, I found this interesting but a little frustrating. The second color it asks about is clearly cyan (or turquoise). For me, this is like showing an orange screen and asking if it is red or yellow.
I understand that across cultures "orange" does not exist as a distinctly named color (it only got its name in most European languages around the 1500s), but as someone who was trained since preschool that orange is a distinct color, it would feel wrong to "round" it to red or yellow.
I haven't had green-cyan-blue drilled into me the same way as red-orange-yellow. So sometimes I do "round" it. I might note how "green" some cyan river water is, or call something cyan "blue" when it is next to something kelly green. But when I just have a screenfull of pure cyan light, I don't know what else to call it.
As a side note, I do wonder how differently a child would perceive color if they were taught more than 7 colors in preschool.
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smokedetector1
The other week my wife and I were disagreeing over whether a house was green or blue. I was shocked when every passerby we asked agreed with her that it was green. I was absolutely 100% sure it was blue. Turns out according to this site, my boundary is greener than 95% of the population! Funny to see this proved out here!
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percentcer
I think the alternative should be "this is not blue". I was served what I would call a "teal" or "turquoise" but the alternative button shows "this is green", which it was not.
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gumby271
"for you, turquoise is blue." Well no, it's turquoise, that's why we gave it a whole different word.
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benleejamin
I think there's an anchoring effect in play here. If you select blue -> blue -> green -> blue -> green -> blue -> green…, you land at the population median.
(The point being that, once you get to a somewhat ambiguous point (after two blue selections), you can say "oh, well, compared to the last one this is {opposite color}!", and it seems most people do that.)
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naishoya
Younger locals who have mostly or only known the LED think it's a bit odd, but just call them blue because that's the common convention and many youths may think that the former lights might have actually been blue.
IIRC from when I moved to Japan the first time (30+ y ago) when the old lights were standard, being a wildly curious Gaijin enough to ask "why" about these kinds of strange contradictions, and having lots of exposure in that time to senior citizens who had the spare time and inclination to humor my incessant questions, several of these octogenarian to centarians remembered the introduction of the first gen traffic lights, when the automobile became common enough to require them; and this seeming contradiction was new; this was the explanation I have heard common across several distinct conversations in different towns:
1. 緑 "midori" as a character and word for green was not very common usage before the end of WWII.
2. The (pre-LED) lamps for all three were yellow bulbs viewed through glass filters that were 'red', 'clear-somewhat yellow', and 'blue' - so even though it may appear green, the blue was for the color of the glass.
Also because 青い "aoi" has persisted in use for certain shades of 'green' - for example green apples and leafy fresh veggies; so this 'blue' seems to match the actual color of the light and has an implicit meaning for Japanese - in the sense of 'go while light is still fresh' - and Japanese humor is primarily Punny instead of being actually Funny, so this double meaning resonates even after switching to truly green LED light sources.
a3w
To all you nitpickers:
I looked at a "white" wall and out of the window, and teal was slightly blue or green tinted afterward. Do that, too. Also, screen brightness shifted my result, as color calibration is of course an issue.
seemaze
This makes no sense. It's like asking:
"Alice is in Denver. Is Alice in (a) Canada or (b) Mexico?"
- Your boundary between Canada and Mexico is at 40° latitude, more southern than 53% of the population.
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hn_throwaway_99
I never understood "forced classification" games like this (as an aside, it's also why I always hated Myers Briggs). Maybe it's because I'm somewhere on the spectrum, but it always seems like a dumb, false choice to me.
For example, when I saw the second color, "aqua" immediately popped into my mind. Aqua is literally defined as #00FFFF in RGB color space - no red, equal (max) parts blue and green. So it just felt like flipping a coin to me as it felt neither more blue nor more green.
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technothrasher
Should this be called "Is my monitor's blue your monitor's blue?"
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WesleyJohnson
I'm sure this isn't an original thought, but I wonder how others see colors. Irrespective of color blindness, is what I know as red appear as blue to someone else? How would you even know or describe it? "Red, like a strawberry, tomato, or apple." And they say, "Yes, exactly." But what they're truly seeing is what YOU know as blue. They see something different than you do, but to them that color has always been called red - even though, if you were to see it as them, it's blue.
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PunchyHamster
shows turqoise
"Is it blue" ?
No clown, learn colors
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mazurnification
What a fun site. Obviously results will depend on the monitor. At the last screen picture which show "where is my blue" and the gradient from green to blue I moved it from one monitor to other - what a difference! Time to dig into monitors setting to get more consistency (or for new monitors - do the color change with time? - one is more lit in the morning by sun but other do not get direct sunlight almost at all- both are the same type). What is funny it did not bother me at all - I do not work with any graphics and color. But probably now it will :).
There's a big cultural component to it, and many languages don't even distinguish blue and green! Also many languages only distinguish them surprisingly recently --- for example, Chinese and Japanese used to use the word 青 which can refer to both blue and green, and even now, the color of the sky in the Republic of China (Taiwanese) flag is referred to by that character.
In Polish language we commonly call turquoise "lightblue", so instinctively we'll have the boundary not at the middle of the turquoise, but between the turquiose and green, (i got hue 165, 95% of the population). We also call it "sea-color", but sea is also more culturally associated with blue than green.
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Glyptodon
I don't like this because many of these transition colors I don't really consider blue or green but some sort of blue-green or green-blue.
I would also trust the results more if it bounced you around a bit randomly rather than tried to center you in. It gets to a point where I don't really have confidence and I suspect the environment around me contributed a fair amount at that point.
Seem to get ~172.
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My_Name
Tried this on 2 monitors, made a difference of 77%-85%
I noticed that what I was actually seeing later on was 'is this more blue or green than the last colour' due to my eyes adjusting to the previous screen and just seeing the difference.
still_grokking
This "test" makes no sense. Cyan, and especially turquoise are neither blue nor green, they are a mix (similar to orange between red / yellow).
I had actually a very hard time to answer the questions, needed to overlay most of the color with some mostly white / light gray window and only squint at the color around it to decide. In the end my result was 176, which is almost the exact turning point for most people (and that even while my monitor is set to be more cold than default; but like said I had whatever my monitor shows as "white" to compare; even that "white" is likely technically slightly blue-ish).
Color perception is anyway much more influenced by contrasts then anything else. (Likely similar to acoustic tones, which are very hard to name / locate absolutely than when comparing to some reference tone.)
Besides the things mentioned in the about popup, blue is AFAIK the color we have the most receptors for. So it's imho quite "natural" that most people perceive cyan—which is technically the exact middle—as blue-ish, and of course the color left to it, turquoise, is green-ish (and as it seems, for most people, the mentioned turning point).
ticulatedspline
72 green though where it drew me on the gradient at the end I definitely would say the line is on green. and the swatch that is says I think would be blue was, well turquoise and not "blue".
my path was basically: ok def blue, ok cyan which would be "blue", greenish sea-foam? teal? ok now I wouldn't call these green Or blue . Then kinda bobbled the guess
crappy monitor aside, Feels like there's a combination of factors, some color fatigue from looking at a full screen saturated color and I think some "over thinking" the colors.
pcblues
I had a colour-blindness test when I worked at an abattoir.
My job was to find odd things on a one third section of a side of beef as it went past and cut it off. 1500 or so per day.
The test showed numbers created with blobs of close colours.
The last test didn't have a number in it.
Cheeky buggers.
afandian
Cool to see this experiment crowdsourced.
Guy Deutscher’s “Through the Language Glass” is a very readable history of linguistic relativism, including the long history of this experiment. It even has some colour plates to illustrate. Recommended.
How much does display calibration factor into this? I'm fairly confident it must impact the results, but unsure how much error it would introduce.
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junon
> Your boundary is at hue 164, greener than 94% of the population. For you, turquoise is blue.
No, turquoise is turquoise!!1
hyperpape
I think this site is doing a binary search, so that you narrow down on a boundary.
It would be much funnier, and also more insightful, if it didn't do this and let you contradict yourself.
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halapro
It's crazy to me that most people don't get it. This is not a "who knows the exact name of this hex color" game, it's "more blue or more green?"
Orange is its own color, but is this hue it 51% red or 51% yellow?
MrZander
Interesting.
Looking at each in isolation, my boundary is pretty far into Green territory. But when I look at the gradient, I would place it far closer to the center.
Also, I found that sometimes it looked like there were two colors. The top was green and bottom was blue. Maybe my monitor?
altairprime
My numbers kept varying wildly from 174 to 189, in the same patterns across multiple devices (initial number different from stable next-five results), so I tried a few things.
First I shifted the app to use P3 `oklch(.7066 .1611 $hue)` with range (150..210) centered on cyan at 180°, same as sRGB. No change, so it's not some sort of artifact of colorspaces. Then I upped it to 16 steps instead of 8. The window narrowed slightly, but the same first-then-the-rest shift kept happening. Finally I raised the random color static mask duration from 200ms to 5000ms. Scored 180 +/- 1. Huh. Makes sense, given the image persistence stuff I deal with.
So, for those seeing that same variability I'd recommend editing that first (local response override index-blah.js, search `, 200` replace `, 5000` by hand, reload page) to get a more stable result.
zkmon
Though everyone calls a solid blue color as blue, the actual visual perception or experience of that color could be entirely different. They just grew up calling that experience of their own, as blue color.
kroeckx
As others have pointed out, the 2nd color is not something I would call either blue or green. Except for the first, it never showed anything I would call blue. So really I have told it the border where I still call something green. So is my green your green?
cranx
This is flawed. Turquoise is not blue or green. Also different displays will show different colors. And a lot of displays aren’t great at producing the hues in the green color space. Idk the test seems arbitrary, but I’m not color expert
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sega_sai
One thing that I find interesting when thinking about colour perception, is that even if two people agree that a given colour is red, there is no way to know (as far as I am aware) that they actually perceive it in the same way. Maybe the brain of one person paints it red, and another paints it differently, and there is no way to know as we can't get into other people's heads.
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dbcurtis
Who else tried with both eyes? A few years ago I had an implant to treat cataracts. It was notable at the time that the "new" eye was less yellow-tinted than the aged-in-place eye. I was told that the lens does yellow with age. Over time, my brain mostly adjusted, but on this test I did notice a subtle hue difference between eyes. Did anyone else try that experiment?
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pibaker
It is mentioned on the about page but I still feel like pointing out that your response to this test has as much to do with your perception of colors as how green or blue your screen is and what kind of ambient lighting there is. Especially considering how subtle the differences are in the final rounds of the test.
Still an interesting experiment, but I would be cautious about drawing conclusions about anything from it.
chirayuk
"Your boundary is at hue 181, bluer than 87% of the population.
For you, turquoise is green."
Took it 3 times (90%, 85%, 87%). At least, I now know why sometimes I'm surprised that people call green things blue :)
To be honest, there should have been a "neither" category, because that was frustrating to classify a color that is clearly neither. But I understand the need for a binary choice for this experiment.
Turquoise `#40E0D0 ` feels green to me, while Dark Turquoise `#00CED1` , I can agree to consider as blue.
cjbgkagh
This is like one of those eye tests where they switch between lenses narrowing in on the prescription. The question is really what shades of turquoise is more blue than green.
I got 80 which is close enough, I think it’s really only the extremes that are meaningful. I tried simply alternating green-blue etc and got 60. I think adding some randomness and taking more samples (more questions) would help - I was worried that the prior color left a residual effect as a relative comparison was easier than absolute comparison. The extra random samples could help give an idea of confidence in that middle zone.
parpfish
I've got a color question that I need some opinions on:
When I look at the green/blue boundary region on an HSV color wheel like the ones in this S/O thread [0], it appears as a white un-saturated region.
If I look at similar layouts in other colorspaces (e.g., something perceptually uniform like Lab) I don't generally see this white patch.
My question is:
- I'm colorblind. Do other people also see a white patch there?
- If this is a genuine problem with HSV, is there an explanation for why there's a hue angle that is unsaruated regardless of S value?
Reminds me of the discussions with my wife. She is from Japan and, over there, you cross a traffic light when it's "blue". IIRC, the word was chosen before international agreements, and the colour has shifted towards green since, but it's still more blueish than in other countries. And they still call it "blue".
0xWTF
I came back as with a measure of 174 and a label of "true neutral".
However, I know enough about perception to know that this called for some hacking.
So as soon as I saw the second color I realized I needed to look at something else. So each time after choosing and seeing the next color I looked around quite a bit, inside and through the windows at the outside (I happen to be in a Hawaii, so blues and greens are abundant) before choosing and I noticed significantly different color perception after looking around, specifically, I had more confidence in whether it was blue or green.
I can imagine if you just stare at the colors and try to power through, you might get kinda irritated.
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phyzix5761
We never get to find out what the author's blue is
aidenn0
Just last week I called something blue and my daughter objected; she said it was green. After discussion we both agreed it was was teal and she said roughly "but teal is a shade of green." To me Teal is a (admittedly greenish) shade of blue.
jumploops
Curious how this looks for red/green colorblind folks?
Do they see everything beyond the initial green as a shade of blue?
--Edit--
My red/green colorblind father just got back me with this result:
> Your boundary is at hue 175, bluer than 68% of the population. For you, turquoise is green.
red_admiral
If you have a spare moment today, look up "wine-dark sea". As far as we can tell, there was no such thing as a _concept_ of blue in Ancient Greece.
rendx
> Your boundary is at hue 174, just like the population median. You're a true neutral.
jFriedensreich
apart from not giving the "neither" option of turquoise, you cannot just line up asking without neutralising perception in between eg. with a non blue/green and then white before the next test. Color perception is >relative< not just across individuals, not sure how someone interested enough in blue perception does not understand this.
dgan
> For you, the turquoise is green!
No, turquoise is turquoise. You gave me two options, and you act like I didn't know that word exists
moritzwarhier
My blue is in fact what others see as red, and vice versa, but I wasn't able to verify it yet!
danbmil99
Dunno if this is a late-in-life thing or I was always like this, but I definitely need more blue to see blue than most (this test put me at 82%, I think that means I'm in the lowest quintile for seeing blue?) Bright blue still looks mighty blue, but when light is dim, I basically see black where most would still see blue.
Practical ramifications:
* Some of my 'black' shirts are blue when it's sunny
* Popular desktop themes (solarized dark) have text that is completely unreadable
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throwaway93241
This is cretinous. There's a well defined colour in between blue and green which is turquoise / cyan. It even says at the end "You see turquoise as x". No I don't, I see it as turquoise. It's like asking is the red or is this yellow without acknowledging the existence of orange. Either rage bait or pure idiocy.
I suggest replacing "is" with "is closer to", since shown color is obviously not blue nor green.
nubinetwork
I must be colourblind, most of those look the same on my phone.
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Balgair
Interesting!
I have UV filters on my glasses and things really changed when I took them on of off. I was much greener with the UV filtering glasses on. I guess my eyes are not picking up on things somehow.
HoldOnAMinute
>> Your boundary is at hue 177, bluer than 76% of the population. For you, turquoise is green.
Not really sure how to interpret this. Where is "normal" on the curve?
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harrall
One of my eyes sees (very) slightly greener than the other one.
But with both eyes I got
> Your boundary is at hue 174, just like the population median. You're a true neutral.
I should test with one eye.
red75prime
I forgot that my display is in night mode (reducing blue light intensity). And I ended up with "your boundary is bluer than 98% of the population."
notatoad
I did it twice. The first time, I was bluer than 57% the second time I was greener than 63%.
sbinnee
In Korean, we have an adjective "푸르다". It is somewhere between blue and green. You can say trees are that, oceans are that. It also means unripe.
Yeah, so to me, tortoise is definitely blue.
Edit: typo tortoise -> turquoise
Night_Thastus
This is also going to be very difficult because:
* HDR vs SDR mode
* Different monitors have different color replication ranges
* Monitor and OS color and brightness controls (brightness affects color perception)
* Interior lighting
* Monitor technology (LCD, OLED, etc)
Meaning even if a color was meant to be X, it just won't appear that way given the combinations above.
ozten
Showing the completion screen and giving the ability to use a slider to pick the center might be more useful.
drfloyd51
Some languages don’t make a distinction. And if a language doesn’t have a word for green or blue it won’t have a word for brown or orange either.
Your monitor model, screen settings, .. play a significant role in here. Try it on different screens to get different results.
dc96
Noticing on my monitor that it's more blue if I tiptoe and look down, and it's obviously green when looking at below.
I think a better way to standardize this without too much variance in color would be make the user denote on the screen where they are actually looking perpendicular to the screen and judge from that area.
ForgotMyUUID
On the third step, this is turquoise and there is no button for that answer.
Thanks to the TMS9918, I know cyan when I see it! Years of seeing cyan on a composite monitor where hue is tricky to adjust. My tolerance for the amount of green allowed in cyan is higher. And if it's cyan, it's blue. I see I classified quite a few greenish as cyan therefore blue.
mbo
I feel like there needs to be some sort of intermediate black screen between the questions, a visual "palette cleanser" if you will. I was actively noticing the saturation of the color decline as I stared at the screen.
Sweepi
TIL: I mixed up the meaning of turquoise and teal.
I wouldn't call most of those colors green or blue. Most of them looked identical to me as well. I ended up picking arbitrarily for all but the two I thought were distinctly one or the other.
nox21125
>> Your boundary is at hue 173, greener than 57% of the population. For you, turquoise is blue.
very subtle changes in color after the first two. it also seems to be repeating blue -> green -> blue -> green, for me atleast.
jp57
I have my doubts about the value of a two-alternative forced choice task for this. I was pretty much answering randomly both of the time because I wouldn't ncessarily have called either green or blue.
D-Machine
Asinine and meaningless. Forces a classification on something that obviously anyone with fully-functioning colour vision will classify as "aquamarine" or "turquoise" or etc.
This has nothing at all to do with colour perception, or, if actual differences in perception are involved, this test fails to distinguish those from individual differences in assignment to linguistic categories.
EDIT: To actually test something like this, you need to make an assumption that cannot easily be tested or supported by evidence.
E.g. say we could all agree that, generally, blue + orange is a more pleasant pairing than blue + green. One might then imagine a series of images using orange + varying interpolations between blue and green, with the prompt being "is this combination of colours more or less aesthetically pleasing than the last". The average cutpoint could then be interpreted as a subjective judgement of where e.g. teals become "more blue", from an aesthetic / complementary standpoint. But this test does nothing of the sort.
wilj
This is awesome! I have a slight case of tritanopia in one eye and it was neat to see the difference. My boundary is bluer by 59% in one eye and 87% in the other. It tracks with what I would have expected.
Rapzid
I don't find this compelling as it seems to me it's well acknowledged there are colors that are BOTH. As in there are colors widely considered to be blue-green. Blue and Green.
bojo
While neat, I don't get consistent scores if I retry it a few times. If it leads with a series of greens first, my score is more green oriented, and vice versa.
jameson
"teal" is the name for color "Moderate bluish green"
I was always fascinated by this kind of question as a kid. Like I would imagine that everyone had all the colors mixed up and we were each seeing something different.
turtleyacht
> Your boundary is at hue 181, bluer than 87% of the population. For you, turquoise is green.
Pretty sure I accidentally picked blue for a green once.
coldtea
If you're not colorblind, yes. More or less.
Not much sense for the evolutionary machinery to keep the whole backend the same, but diverge in the perception part.
layer8
This only checks a single brightness level per hue. I bet that two people who agree for those levels might very well disagree at other levels, and vice versa.
adxl
I used to own a house in California which I swore was peach, my coworker told me face it the house is pink.
fagnerbrack
Witgeinstein's Beetle xD
Insanity
Would be cool to see a gender distribution. Women perceive more colours than men, wonder how it impacts this.
iterateoften
Im left delighted to find out something new, but left wanting to know how to use it.
Like if im 75% on the green transition, how do i use this information.
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malbs
Also no way to account for the variation of LCD displays. The same "colour" can look different on two different panels
timnetworks
> Your boundary is at hue 172, greener than 63% of the population. For you, turquoise is blue.
isn't turquoise exactly (50%) between the two?
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tjwebbnorfolk
After 4 clicks, I can no longer decide whether it is green or blue. I would pick "neither" if it were offered
hyperific
It just keeps showing me the same color over and over.
sleepycat801
Two different screens (OLED vs LCD), two different results.
celeryd
This is stupid without color calibration, or even contrast/brightness levels on your monitor, which can turn these turquoise shades into other colors entirely.
SamInTheShell
Showed me teal but only have options for blue and green. Teal ain't either.
stephenlf
Fun. Are you accepting PRs? I would love to add a “share” button that shares the color I landed on
softbuilder
I want this but for blue vs. purple.
nektro
> Your boundary is at hue 174, just like the population median. You're a true neutral.
halapro
They're all xanh to me.
mncharity
The xkcd color survey[1] was 16 years ago now. With the data available, there were various follow-ups. Many, including xkcd's own "take it for fun here" link there in [1], are now 404. But the strata[2] and word cloud[3] are still up, and relevant here.
The data remains available. It was a TidyTuesday ("social data project") for 2025-07-08.[4] This response[5] looked at TFA. (This week's TT is ag tariffs.[9])
I just did a quick and sloppy search, so there's likely more out there. Curiously, I found AIMode and Bing/chat less immediately helpful than I'd have guessed.
Years ago I used the xkcd data for a prototype web interactive for kids, which shader filtered video to selected colors... but it was overlapping rather than a partition, and I'd never leave out cyan. Hmm, maybe a vibe coding target.
Tried it on two displays, one I’m 82% green, the other I’m 75% blue.
cwillu
For some reason, dragging the window makes the chart re-animate.
LocalH
Also needs a button "this is both" for colors like cyan
yapyap
It said that for me Turqouise is blue.. it is not, there was just no option for tuqouise
debpalash
almost got fooled by blue being green or vice versa. nice experiment!
d--b
In France turquoise is historically called “bleu turquoise”, so French people would definitely categorize the in-between as blue.
thepra
hue 174, "true median" .-.
7777777phil
Despite all the (valid) criticisms here I just wanted to say that this is a really cool Idea and well executed imo. Thanks for sharing!
OwlGoesHoot
Man doesn’t understand teal the website
anyfoo
Wow. Did anyone else have some serious trouble with this?
The first color was obvious to me, as it was designed to be (it even tells you if you intentionally misclick). But at the very next color, the first "test color", I literally face palmed and said "oh my god" out loudly.
It was so, so hard for me to decide. I really just wanted to pick a non-existent "teal" option. Both "blue" or "green" felt wrong and equally right at the same time.
It just got harder from there. At the end, it told me that my threshold is "bluer than 80% of the population", but honestly, I don't think that's really true in my case. I was so ambivalent, my choices really felt random to me very quickly.
freecodyx
cyan is neither blue nor green
wat10000
I wonder how much of this is testing people's eyes/brains, and how much is testing their screens.
w-ll
turquoise is green.
FpUser
>"Your boundary is at hue 187, bluer than 97% of the population. For you, turquoise is green"
Problem is that it asks to categorize colors that to me are neither blue nor green
gunalx
Can we get this with more different colors.
Like forest green olive green. navy blue.
Also maybe the full color spectrum. And a select set of colors to pick from.
metalman
people are getting more stupid
debate without evidence and logic is rampant
the title is the clasic example of word salad, pretending to be valid conjecture , but only exists to cause distraction through
"subjectification"
or foucault off, already
When the final threshold image was displayed, I felt that the boundary was too far over to the left and I had a fair amount of green on the blue side.
I think this would work better if the hues jumped around a bit instead of blatantly triangulating, so that you wouldn't be biased by your prior semection.
user3939382
I think things are green that other people think are grey. Never heard of that with anyone else.
andai
Pro tip, I had my device's blue light filter enabled.
I want to say that shifted my score a lot. But every time I play I get a pretty different score, even on the same screen calibration. So, uh...
Uptrenda
crowd sourced perception research. Love it, OP.
foxes
I just took it to mean is this more blue or green rather than literally blue or green. Correct answer is then 180, anything else is clearly a fail :)
ece
I got hue 175 twice, but bluer than 66% of the population once and 59% the second time.
u8080
Midori
antisthenes
This assumes that the person you're testing isn't aware of the whole category of colors that sit between green and blue?
There's teal, cyan, aquamarine, etc...It's such a uniquely american notion to force someone to categorize something (incorrectly) into one of 2 things. Almost a comical parallel to the political system.
moffkalast
This is cyan!
nicebyte
it's a neat experiment but I think it's ultimately flawed because color is usually perceived in context, and depending on context I could easily see anyone reinterpreting the hues they labeled "green" in this test as blue, and vice versa.
EDIT:
in general, blue is a pretty fascinating color. yes, many cultures have a somewhat blurry distinction between blue and green. Some others seem to differentiate shades of blue that others don't (i.e. in Russian "голубой" and "синий" refer to distinct colors but in English those would be just shades of blue). I guess there's something about photons in that energy band that messes with perception. https://en.wikipedia.org/wiki/Non-photo_blue
As other commenters here have noted, I found this interesting but a little frustrating. The second color it asks about is clearly cyan (or turquoise). For me, this is like showing an orange screen and asking if it is red or yellow.
I understand that across cultures "orange" does not exist as a distinctly named color (it only got its name in most European languages around the 1500s), but as someone who was trained since preschool that orange is a distinct color, it would feel wrong to "round" it to red or yellow.
I haven't had green-cyan-blue drilled into me the same way as red-orange-yellow. So sometimes I do "round" it. I might note how "green" some cyan river water is, or call something cyan "blue" when it is next to something kelly green. But when I just have a screenfull of pure cyan light, I don't know what else to call it.
As a side note, I do wonder how differently a child would perceive color if they were taught more than 7 colors in preschool.
The other week my wife and I were disagreeing over whether a house was green or blue. I was shocked when every passerby we asked agreed with her that it was green. I was absolutely 100% sure it was blue. Turns out according to this site, my boundary is greener than 95% of the population! Funny to see this proved out here!
I think the alternative should be "this is not blue". I was served what I would call a "teal" or "turquoise" but the alternative button shows "this is green", which it was not.
"for you, turquoise is blue." Well no, it's turquoise, that's why we gave it a whole different word.
I think there's an anchoring effect in play here. If you select blue -> blue -> green -> blue -> green -> blue -> green…, you land at the population median.
(The point being that, once you get to a somewhat ambiguous point (after two blue selections), you can say "oh, well, compared to the last one this is {opposite color}!", and it seems most people do that.)
Younger locals who have mostly or only known the LED think it's a bit odd, but just call them blue because that's the common convention and many youths may think that the former lights might have actually been blue.
IIRC from when I moved to Japan the first time (30+ y ago) when the old lights were standard, being a wildly curious Gaijin enough to ask "why" about these kinds of strange contradictions, and having lots of exposure in that time to senior citizens who had the spare time and inclination to humor my incessant questions, several of these octogenarian to centarians remembered the introduction of the first gen traffic lights, when the automobile became common enough to require them; and this seeming contradiction was new; this was the explanation I have heard common across several distinct conversations in different towns:
1. 緑 "midori" as a character and word for green was not very common usage before the end of WWII.
2. The (pre-LED) lamps for all three were yellow bulbs viewed through glass filters that were 'red', 'clear-somewhat yellow', and 'blue' - so even though it may appear green, the blue was for the color of the glass.
Also because 青い "aoi" has persisted in use for certain shades of 'green' - for example green apples and leafy fresh veggies; so this 'blue' seems to match the actual color of the light and has an implicit meaning for Japanese - in the sense of 'go while light is still fresh' - and Japanese humor is primarily Punny instead of being actually Funny, so this double meaning resonates even after switching to truly green LED light sources.
To all you nitpickers: I looked at a "white" wall and out of the window, and teal was slightly blue or green tinted afterward. Do that, too. Also, screen brightness shifted my result, as color calibration is of course an issue.
This makes no sense. It's like asking:
I never understood "forced classification" games like this (as an aside, it's also why I always hated Myers Briggs). Maybe it's because I'm somewhere on the spectrum, but it always seems like a dumb, false choice to me.
For example, when I saw the second color, "aqua" immediately popped into my mind. Aqua is literally defined as #00FFFF in RGB color space - no red, equal (max) parts blue and green. So it just felt like flipping a coin to me as it felt neither more blue nor more green.
Should this be called "Is my monitor's blue your monitor's blue?"
I'm sure this isn't an original thought, but I wonder how others see colors. Irrespective of color blindness, is what I know as red appear as blue to someone else? How would you even know or describe it? "Red, like a strawberry, tomato, or apple." And they say, "Yes, exactly." But what they're truly seeing is what YOU know as blue. They see something different than you do, but to them that color has always been called red - even though, if you were to see it as them, it's blue.
shows turqoise
"Is it blue" ?
No clown, learn colors
What a fun site. Obviously results will depend on the monitor. At the last screen picture which show "where is my blue" and the gradient from green to blue I moved it from one monitor to other - what a difference! Time to dig into monitors setting to get more consistency (or for new monitors - do the color change with time? - one is more lit in the morning by sun but other do not get direct sunlight almost at all- both are the same type). What is funny it did not bother me at all - I do not work with any graphics and color. But probably now it will :).
Interestingly, there are several languages where blue and green are one color https://en.wikipedia.org/wiki/Blue%E2%80%93green_distinction...
There's a big cultural component to it, and many languages don't even distinguish blue and green! Also many languages only distinguish them surprisingly recently --- for example, Chinese and Japanese used to use the word 青 which can refer to both blue and green, and even now, the color of the sky in the Republic of China (Taiwanese) flag is referred to by that character.
https://en.wikipedia.org/wiki/Blue%E2%80%93green_distinction...
https://en.wikipedia.org/wiki/Blue_Sky_with_a_White_Sun
I would love to know if "Cambridge Blue" is actually blue to the average person, because, to me, it's green...
[0] - https://en.wikipedia.org/wiki/Cambridge_Blue_(colour)
In Polish language we commonly call turquoise "lightblue", so instinctively we'll have the boundary not at the middle of the turquoise, but between the turquiose and green, (i got hue 165, 95% of the population). We also call it "sea-color", but sea is also more culturally associated with blue than green.
I don't like this because many of these transition colors I don't really consider blue or green but some sort of blue-green or green-blue.
I would also trust the results more if it bounced you around a bit randomly rather than tried to center you in. It gets to a point where I don't really have confidence and I suspect the environment around me contributed a fair amount at that point.
Seem to get ~172.
Tried this on 2 monitors, made a difference of 77%-85%
I noticed that what I was actually seeing later on was 'is this more blue or green than the last colour' due to my eyes adjusting to the previous screen and just seeing the difference.
This "test" makes no sense. Cyan, and especially turquoise are neither blue nor green, they are a mix (similar to orange between red / yellow).
I had actually a very hard time to answer the questions, needed to overlay most of the color with some mostly white / light gray window and only squint at the color around it to decide. In the end my result was 176, which is almost the exact turning point for most people (and that even while my monitor is set to be more cold than default; but like said I had whatever my monitor shows as "white" to compare; even that "white" is likely technically slightly blue-ish).
Color perception is anyway much more influenced by contrasts then anything else. (Likely similar to acoustic tones, which are very hard to name / locate absolutely than when comparing to some reference tone.)
Besides the things mentioned in the about popup, blue is AFAIK the color we have the most receptors for. So it's imho quite "natural" that most people perceive cyan—which is technically the exact middle—as blue-ish, and of course the color left to it, turquoise, is green-ish (and as it seems, for most people, the mentioned turning point).
72 green though where it drew me on the gradient at the end I definitely would say the line is on green. and the swatch that is says I think would be blue was, well turquoise and not "blue".
my path was basically: ok def blue, ok cyan which would be "blue", greenish sea-foam? teal? ok now I wouldn't call these green Or blue . Then kinda bobbled the guess
crappy monitor aside, Feels like there's a combination of factors, some color fatigue from looking at a full screen saturated color and I think some "over thinking" the colors.
I had a colour-blindness test when I worked at an abattoir.
My job was to find odd things on a one third section of a side of beef as it went past and cut it off. 1500 or so per day.
The test showed numbers created with blobs of close colours.
The last test didn't have a number in it.
Cheeky buggers.
Cool to see this experiment crowdsourced.
Guy Deutscher’s “Through the Language Glass” is a very readable history of linguistic relativism, including the long history of this experiment. It even has some colour plates to illustrate. Recommended.
https://www.penguin.co.uk/books/412264/through-the-language-...
There are colors in between blue and green that are neither blue nor green!
This is great!
Somewhat similar to a site I made a while ago, but for more "perception boundary" colors: https://theleo.zone/colorcontroversy/
How much does display calibration factor into this? I'm fairly confident it must impact the results, but unsure how much error it would introduce.
> Your boundary is at hue 164, greener than 94% of the population. For you, turquoise is blue.
No, turquoise is turquoise!!1
I think this site is doing a binary search, so that you narrow down on a boundary.
It would be much funnier, and also more insightful, if it didn't do this and let you contradict yourself.
It's crazy to me that most people don't get it. This is not a "who knows the exact name of this hex color" game, it's "more blue or more green?"
Orange is its own color, but is this hue it 51% red or 51% yellow?
Interesting. Looking at each in isolation, my boundary is pretty far into Green territory. But when I look at the gradient, I would place it far closer to the center.
Also, I found that sometimes it looked like there were two colors. The top was green and bottom was blue. Maybe my monitor?
My numbers kept varying wildly from 174 to 189, in the same patterns across multiple devices (initial number different from stable next-five results), so I tried a few things.
First I shifted the app to use P3 `oklch(.7066 .1611 $hue)` with range (150..210) centered on cyan at 180°, same as sRGB. No change, so it's not some sort of artifact of colorspaces. Then I upped it to 16 steps instead of 8. The window narrowed slightly, but the same first-then-the-rest shift kept happening. Finally I raised the random color static mask duration from 200ms to 5000ms. Scored 180 +/- 1. Huh. Makes sense, given the image persistence stuff I deal with.
So, for those seeing that same variability I'd recommend editing that first (local response override index-blah.js, search `, 200` replace `, 5000` by hand, reload page) to get a more stable result.
Though everyone calls a solid blue color as blue, the actual visual perception or experience of that color could be entirely different. They just grew up calling that experience of their own, as blue color.
As others have pointed out, the 2nd color is not something I would call either blue or green. Except for the first, it never showed anything I would call blue. So really I have told it the border where I still call something green. So is my green your green?
This is flawed. Turquoise is not blue or green. Also different displays will show different colors. And a lot of displays aren’t great at producing the hues in the green color space. Idk the test seems arbitrary, but I’m not color expert
One thing that I find interesting when thinking about colour perception, is that even if two people agree that a given colour is red, there is no way to know (as far as I am aware) that they actually perceive it in the same way. Maybe the brain of one person paints it red, and another paints it differently, and there is no way to know as we can't get into other people's heads.
Who else tried with both eyes? A few years ago I had an implant to treat cataracts. It was notable at the time that the "new" eye was less yellow-tinted than the aged-in-place eye. I was told that the lens does yellow with age. Over time, my brain mostly adjusted, but on this test I did notice a subtle hue difference between eyes. Did anyone else try that experiment?
It is mentioned on the about page but I still feel like pointing out that your response to this test has as much to do with your perception of colors as how green or blue your screen is and what kind of ambient lighting there is. Especially considering how subtle the differences are in the final rounds of the test.
Still an interesting experiment, but I would be cautious about drawing conclusions about anything from it.
"Your boundary is at hue 181, bluer than 87% of the population.
For you, turquoise is green."
Took it 3 times (90%, 85%, 87%). At least, I now know why sometimes I'm surprised that people call green things blue :)
To be honest, there should have been a "neither" category, because that was frustrating to classify a color that is clearly neither. But I understand the need for a binary choice for this experiment.
Turquoise `#40E0D0 ` feels green to me, while Dark Turquoise `#00CED1` , I can agree to consider as blue.
This is like one of those eye tests where they switch between lenses narrowing in on the prescription. The question is really what shades of turquoise is more blue than green.
I got 80 which is close enough, I think it’s really only the extremes that are meaningful. I tried simply alternating green-blue etc and got 60. I think adding some randomness and taking more samples (more questions) would help - I was worried that the prior color left a residual effect as a relative comparison was easier than absolute comparison. The extra random samples could help give an idea of confidence in that middle zone.
I've got a color question that I need some opinions on:
When I look at the green/blue boundary region on an HSV color wheel like the ones in this S/O thread [0], it appears as a white un-saturated region.
If I look at similar layouts in other colorspaces (e.g., something perceptually uniform like Lab) I don't generally see this white patch.
My question is: - I'm colorblind. Do other people also see a white patch there? - If this is a genuine problem with HSV, is there an explanation for why there's a hue angle that is unsaruated regardless of S value?
[0] https://stackoverflow.com/questions/62531754/how-to-draw-a-h...
Reminds me of the discussions with my wife. She is from Japan and, over there, you cross a traffic light when it's "blue". IIRC, the word was chosen before international agreements, and the colour has shifted towards green since, but it's still more blueish than in other countries. And they still call it "blue".
I came back as with a measure of 174 and a label of "true neutral".
However, I know enough about perception to know that this called for some hacking.
So as soon as I saw the second color I realized I needed to look at something else. So each time after choosing and seeing the next color I looked around quite a bit, inside and through the windows at the outside (I happen to be in a Hawaii, so blues and greens are abundant) before choosing and I noticed significantly different color perception after looking around, specifically, I had more confidence in whether it was blue or green.
I can imagine if you just stare at the colors and try to power through, you might get kinda irritated.
We never get to find out what the author's blue is
Just last week I called something blue and my daughter objected; she said it was green. After discussion we both agreed it was was teal and she said roughly "but teal is a shade of green." To me Teal is a (admittedly greenish) shade of blue.
Curious how this looks for red/green colorblind folks?
Do they see everything beyond the initial green as a shade of blue?
--Edit--
My red/green colorblind father just got back me with this result:
> Your boundary is at hue 175, bluer than 68% of the population. For you, turquoise is green.
If you have a spare moment today, look up "wine-dark sea". As far as we can tell, there was no such thing as a _concept_ of blue in Ancient Greece.
> Your boundary is at hue 174, just like the population median. You're a true neutral.
apart from not giving the "neither" option of turquoise, you cannot just line up asking without neutralising perception in between eg. with a non blue/green and then white before the next test. Color perception is >relative< not just across individuals, not sure how someone interested enough in blue perception does not understand this.
> For you, the turquoise is green!
No, turquoise is turquoise. You gave me two options, and you act like I didn't know that word exists
My blue is in fact what others see as red, and vice versa, but I wasn't able to verify it yet!
Dunno if this is a late-in-life thing or I was always like this, but I definitely need more blue to see blue than most (this test put me at 82%, I think that means I'm in the lowest quintile for seeing blue?) Bright blue still looks mighty blue, but when light is dim, I basically see black where most would still see blue.
Practical ramifications: * Some of my 'black' shirts are blue when it's sunny * Popular desktop themes (solarized dark) have text that is completely unreadable
This is cretinous. There's a well defined colour in between blue and green which is turquoise / cyan. It even says at the end "You see turquoise as x". No I don't, I see it as turquoise. It's like asking is the red or is this yellow without acknowledging the existence of orange. Either rage bait or pure idiocy.
Related:
Is My Blue Your Blue? - https://news.ycombinator.com/item?id=41430258 - Sept 2024 (527 comments)
I suggest replacing "is" with "is closer to", since shown color is obviously not blue nor green.
I must be colourblind, most of those look the same on my phone.
Interesting!
I have UV filters on my glasses and things really changed when I took them on of off. I was much greener with the UV filtering glasses on. I guess my eyes are not picking up on things somehow.
>> Your boundary is at hue 177, bluer than 76% of the population. For you, turquoise is green.
Not really sure how to interpret this. Where is "normal" on the curve?
One of my eyes sees (very) slightly greener than the other one.
But with both eyes I got
> Your boundary is at hue 174, just like the population median. You're a true neutral.
I should test with one eye.
I forgot that my display is in night mode (reducing blue light intensity). And I ended up with "your boundary is bluer than 98% of the population."
I did it twice. The first time, I was bluer than 57% the second time I was greener than 63%.
In Korean, we have an adjective "푸르다". It is somewhere between blue and green. You can say trees are that, oceans are that. It also means unripe.
Yeah, so to me, tortoise is definitely blue.
Edit: typo tortoise -> turquoise
This is also going to be very difficult because:
* HDR vs SDR mode
* Different monitors have different color replication ranges
* Monitor and OS color and brightness controls (brightness affects color perception)
* Interior lighting
* Monitor technology (LCD, OLED, etc)
Meaning even if a color was meant to be X, it just won't appear that way given the combinations above.
Showing the completion screen and giving the ability to use a slider to pick the center might be more useful.
Some languages don’t make a distinction. And if a language doesn’t have a word for green or blue it won’t have a word for brown or orange either.
https://en.wikipedia.org/wiki/Blue%E2%80%93green_distinction...
Your monitor model, screen settings, .. play a significant role in here. Try it on different screens to get different results.
Noticing on my monitor that it's more blue if I tiptoe and look down, and it's obviously green when looking at below.
I think a better way to standardize this without too much variance in color would be make the user denote on the screen where they are actually looking perpendicular to the screen and judge from that area.
On the third step, this is turquoise and there is no button for that answer.
Very relevant complementary reading: https://empiricalzeal.com/2012/06/05/the-crayola-fication-of...
Thanks to the TMS9918, I know cyan when I see it! Years of seeing cyan on a composite monitor where hue is tricky to adjust. My tolerance for the amount of green allowed in cyan is higher. And if it's cyan, it's blue. I see I classified quite a few greenish as cyan therefore blue.
I feel like there needs to be some sort of intermediate black screen between the questions, a visual "palette cleanser" if you will. I was actively noticing the saturation of the color decline as I stared at the screen.
TIL: I mixed up the meaning of turquoise and teal.
Warm blue vs cool blue is another interesting social question: https://www.ducktyped.org/p/a-colorful-controversy
I wouldn't call most of those colors green or blue. Most of them looked identical to me as well. I ended up picking arbitrarily for all but the two I thought were distinctly one or the other.
>> Your boundary is at hue 173, greener than 57% of the population. For you, turquoise is blue.
very subtle changes in color after the first two. it also seems to be repeating blue -> green -> blue -> green, for me atleast.
I have my doubts about the value of a two-alternative forced choice task for this. I was pretty much answering randomly both of the time because I wouldn't ncessarily have called either green or blue.
Asinine and meaningless. Forces a classification on something that obviously anyone with fully-functioning colour vision will classify as "aquamarine" or "turquoise" or etc.
This has nothing at all to do with colour perception, or, if actual differences in perception are involved, this test fails to distinguish those from individual differences in assignment to linguistic categories.
EDIT: To actually test something like this, you need to make an assumption that cannot easily be tested or supported by evidence.
E.g. say we could all agree that, generally, blue + orange is a more pleasant pairing than blue + green. One might then imagine a series of images using orange + varying interpolations between blue and green, with the prompt being "is this combination of colours more or less aesthetically pleasing than the last". The average cutpoint could then be interpreted as a subjective judgement of where e.g. teals become "more blue", from an aesthetic / complementary standpoint. But this test does nothing of the sort.
This is awesome! I have a slight case of tritanopia in one eye and it was neat to see the difference. My boundary is bluer by 59% in one eye and 87% in the other. It tracks with what I would have expected.
I don't find this compelling as it seems to me it's well acknowledged there are colors that are BOTH. As in there are colors widely considered to be blue-green. Blue and Green.
While neat, I don't get consistent scores if I retry it a few times. If it leads with a series of greens first, my score is more green oriented, and vice versa.
"teal" is the name for color "Moderate bluish green"
https://en.wikipedia.org/wiki/Teal
This is obviously 青.
The test's gradient does not have even luminence/saturation.
It needs to interpolate between blue and green in the CIELAB color space.
This is really great. Love the chart at the end. Apparently I evaluate heavily toward thinking green is blue.
The hot debate in my house: is it yellow or green. Is there a test for that?
My mind was blown once when I heard multiple people calling yellow Gatorade (lemon lime) green. I have no clue how anyone perceives it that way.
It looks like this project got forked and updated further https://ismycolor.com/
I was always fascinated by this kind of question as a kid. Like I would imagine that everyone had all the colors mixed up and we were each seeing something different.
> Your boundary is at hue 181, bluer than 87% of the population. For you, turquoise is green.
Pretty sure I accidentally picked blue for a green once.
If you're not colorblind, yes. More or less.
Not much sense for the evolutionary machinery to keep the whole backend the same, but diverge in the perception part.
This only checks a single brightness level per hue. I bet that two people who agree for those levels might very well disagree at other levels, and vice versa.
I used to own a house in California which I swore was peach, my coworker told me face it the house is pink.
Witgeinstein's Beetle xD
Would be cool to see a gender distribution. Women perceive more colours than men, wonder how it impacts this.
Im left delighted to find out something new, but left wanting to know how to use it.
Like if im 75% on the green transition, how do i use this information.
Also no way to account for the variation of LCD displays. The same "colour" can look different on two different panels
> Your boundary is at hue 172, greener than 63% of the population. For you, turquoise is blue.
isn't turquoise exactly (50%) between the two?
After 4 clicks, I can no longer decide whether it is green or blue. I would pick "neither" if it were offered
It just keeps showing me the same color over and over.
Two different screens (OLED vs LCD), two different results.
This is stupid without color calibration, or even contrast/brightness levels on your monitor, which can turn these turquoise shades into other colors entirely.
Showed me teal but only have options for blue and green. Teal ain't either.
Fun. Are you accepting PRs? I would love to add a “share” button that shares the color I landed on
I want this but for blue vs. purple.
> Your boundary is at hue 174, just like the population median. You're a true neutral.
They're all xanh to me.
The xkcd color survey[1] was 16 years ago now. With the data available, there were various follow-ups. Many, including xkcd's own "take it for fun here" link there in [1], are now 404. But the strata[2] and word cloud[3] are still up, and relevant here.
The data remains available. It was a TidyTuesday ("social data project") for 2025-07-08.[4] This response[5] looked at TFA. (This week's TT is ag tariffs.[9])
I just did a quick and sloppy search, so there's likely more out there. Curiously, I found AIMode and Bing/chat less immediately helpful than I'd have guessed.
Years ago I used the xkcd data for a prototype web interactive for kids, which shader filtered video to selected colors... but it was overlapping rather than a partition, and I'd never leave out cyan. Hmm, maybe a vibe coding target.
[1] https://blog.xkcd.com/2010/05/03/color-survey-results/ [2] https://www.datapointed.net/2010/06/xkcd-color-name-strata/ [3] https://luminoso.com/the-color-cloud-an-interactive-visualiz... [4] https://github.com/rfordatascience/tidytuesday/blob/main/dat... [5] https://jofrhwld.github.io/blog/posts/2025/07/2025-07-09_col... Off topic: [9] https://github.com/rfordatascience/tidytuesday/blob/main/dat...
Tried it on two displays, one I’m 82% green, the other I’m 75% blue.
For some reason, dragging the window makes the chart re-animate.
Also needs a button "this is both" for colors like cyan
It said that for me Turqouise is blue.. it is not, there was just no option for tuqouise
almost got fooled by blue being green or vice versa. nice experiment!
In France turquoise is historically called “bleu turquoise”, so French people would definitely categorize the in-between as blue.
hue 174, "true median" .-.
Despite all the (valid) criticisms here I just wanted to say that this is a really cool Idea and well executed imo. Thanks for sharing!
Man doesn’t understand teal the website
Wow. Did anyone else have some serious trouble with this?
The first color was obvious to me, as it was designed to be (it even tells you if you intentionally misclick). But at the very next color, the first "test color", I literally face palmed and said "oh my god" out loudly.
It was so, so hard for me to decide. I really just wanted to pick a non-existent "teal" option. Both "blue" or "green" felt wrong and equally right at the same time.
It just got harder from there. At the end, it told me that my threshold is "bluer than 80% of the population", but honestly, I don't think that's really true in my case. I was so ambivalent, my choices really felt random to me very quickly.
cyan is neither blue nor green
I wonder how much of this is testing people's eyes/brains, and how much is testing their screens.
turquoise is green.
>"Your boundary is at hue 187, bluer than 97% of the population. For you, turquoise is green"
Problem is that it asks to categorize colors that to me are neither blue nor green
Can we get this with more different colors.
Like forest green olive green. navy blue.
Also maybe the full color spectrum. And a select set of colors to pick from.
people are getting more stupid debate without evidence and logic is rampant the title is the clasic example of word salad, pretending to be valid conjecture , but only exists to cause distraction through "subjectification" or foucault off, already
See also: https://en.wikipedia.org/wiki/Wine-dark_sea
When the final threshold image was displayed, I felt that the boundary was too far over to the left and I had a fair amount of green on the blue side.
I think this would work better if the hues jumped around a bit instead of blatantly triangulating, so that you wouldn't be biased by your prior semection.
I think things are green that other people think are grey. Never heard of that with anyone else.
Pro tip, I had my device's blue light filter enabled.
I want to say that shifted my score a lot. But every time I play I get a pretty different score, even on the same screen calibration. So, uh...
crowd sourced perception research. Love it, OP.
I just took it to mean is this more blue or green rather than literally blue or green. Correct answer is then 180, anything else is clearly a fail :)
I got hue 175 twice, but bluer than 66% of the population once and 59% the second time.
Midori
This assumes that the person you're testing isn't aware of the whole category of colors that sit between green and blue?
There's teal, cyan, aquamarine, etc...It's such a uniquely american notion to force someone to categorize something (incorrectly) into one of 2 things. Almost a comical parallel to the political system.
This is cyan!
it's a neat experiment but I think it's ultimately flawed because color is usually perceived in context, and depending on context I could easily see anyone reinterpreting the hues they labeled "green" in this test as blue, and vice versa.
EDIT: in general, blue is a pretty fascinating color. yes, many cultures have a somewhat blurry distinction between blue and green. Some others seem to differentiate shades of blue that others don't (i.e. in Russian "голубой" and "синий" refer to distinct colors but in English those would be just shades of blue). I guess there's something about photons in that energy band that messes with perception. https://en.wikipedia.org/wiki/Non-photo_blue
always blue
I enjoyed this more than I should lol