Is My Blue Your Blue?

I suspect it tests your monitor and monitor calibration as much as your color perception. In particular, sRGB displays have a pretty severely limited green gamut. If you have a wide-gamut display, the test is probably gonna appear different.

But another problem is with displaying the colors essentially full-window, which is going to be nearly-full-screen for many users. When we're staring at a screen with a particular tint, our eyes quickly do "auto white balance" that skews the results. It's the mechanism behind a bunch of optical illusions.

To address that last problem, I think the color display area should be much smaller, or you should be shown all hues at once and asked to position a cut-off point.

I think this is flawed. You quickly end up on a color that's clearly not "blue" or "green" and you're unlikely to keep hitting "this is green" several times in a row, conceding that ok, fine, maybe this is blue, whatever. You're basically measuring how many times people are willing to click the same button in a row.

Edit: Possible improvements: changing the wording to "this is MORE green" and "this is MORE blue" and randomizing the order in which they are shown, somehow. I realize you're just doing some kind of binary search, narrowing the color range.

This is not to mention color calibration of your monitor, or your eyes adjusting / fatiguing to the bold color over time...

I got "Your boundary is at hue 167, greener than 86% of the population. For you, turquoise is blue". I think I consider darker and yellower colours as green - for instance tennis balls are firmly green to me, but a lot of people say they're yellow.

I wonder if this has anything to do with your upbringing. I grew up on a farm in a dry part of Australia, where the grass didn't often get very green. Most of the year it was yellow. If you associate green with grass and the grass is yellow, maybe you associate green with a yellower colour?

Am I missing something? The ambiguous ones are neither blue nor green, they're just cyan.

I'm red/green colourblind, so this was interesting to compare my green against my blue.

The thing I find being colourblind is that I value colour less than shade. Colour signals, even when I can tell them apart, are just less important to me than to non-colourblind people.

I most recently noticed this playing Valheim with my wife. There are red mushrooms in the game, surrounded by green foliage. I noticed that I have trouble spotting them, even though I have no problem seeing that they are red and the foliage is green. To her, the mushrooms stand out as being very visually different from the background and immediately noticeable. To me, they just aren't that distinct and get quite hard to spot.

So while I got the green/blue distinction to within 80% of the population, despite my shitty colour perception, it just didn't matter. At some point in the process I got to "I really don't care. I would ignore the signal that any further difference in colour is sending".

As you can guess, I have fascinating talks with designers and artists, to whom the differences really matter. I understand that colour is really important to them. I just don't see it.

It is a pity that the website does not collect information about whether the participant is color-blind or not.

I stopped at the first one I could not call blue or green.

If I were to call it blue or green, it would not only not be reflecting what I think, but I could not guarantee that if I'm show the exact same color again, that I will go the same way. So I felt there was no point in continuing.

This is a problem in the method; there needs to be a third choice, so that the user can always answer (at least if the test color is always in the blue-green gamut).

It could work with two choices if the user were instructed to randomly choose in the event of indecision. I mean, truly randomly, like by means of a fair coin toss. But that could just be implemented for them by a third button. That button could then just record their indecision rather than randomly choose between blue and green, so you have better data.

Without a third choice, or properly randomized behavior, you have bias problems. For instance, a certain user who likes the blue color might always say blue when not able to decide. Another one might always go for green. Yet, those two users might exactly coincide in what they unmistakably call blue, green and what triggers hesitation/indecision.

(I realize that no matter how many bins we have, there are boundary indecisions, like not being able to decide between green and blue-green. What range constitutes indecision is also subjective.)

Great site.

I wish they had a Turquoise option.

Author here. I added fields so you can specify your first language (relevant link: https://en.wikipedia.org/wiki/Blue%E2%80%93green_distinction...) and colorblindness.

FAQ:

* I can't know your monitor's calibration, your ambient light, or your phone's brightness. Obviously, this will affect the results. However, I am tracking local time of day and device type, from which we should be able to infer whether night mode and default calibration has any aggregate effects. Anecdotally, thus far, I haven't found any effects of Android vs. iPhone (N=34,000).

* The order is randomized. Where you start from can influence the outcome, but methodologically it's better to randomize so the aggregate results average over starting point. You can run the test several times to see how reliable this is for you.

* It's common practice in psychophysics to use two alternatives rather than three (e.g. blue, green, something in the middle). It would be a fun extension, which you can handle with an ordered logistic regression. The code is open if you want to take a shot at it: https://github.com/patrickmineault/ismyblue

* I will release aggregate results on my blog, https://neuroai.science

* I am aware of most of the limitations of this test. I have run psychophysics experiments in a lab on calibrated CRTs during my PhD in visual neuroscience. *This is just entertainment*. I did this project to see if I could make a fun webapp in Vue.js using Claude Sonnet, and later cursor, given that I am not highly proficient in modern webdev. A secondary point was to engage people in vision science and get them to talk and think about perception and language. I think it worked!

Surely this should be using a perceptually uniform color space like OKLab rather than HSL!

You and I have the same name for things that are blue (mostly). That's what this test examines. But what if what I see as blue is actually your red?

Is this even knowable? Like if you were to see through my eyes and you looked at the sky would it be what you called red?

Surprisingly in some languages such as in my mother tongue "Pastho" : we have the same one single word for Blue and Green. let's call it blue.

So we say "Blue like the sky? or blue like the grass"

It felt really odd for me to have to choose one or the other because my language has a name for that intermediate color between blue and green (also applies to any light blue, like that of the sky) but English doesn't.

edit: actually, English does have a name for it, cyan

It was fun! If you are on a Mac / iPhone / iPad:

- Remember to disable Night Shift (went from 86% to 94% by disabling it)

- Use the Apple Display (not external one unless you know it's calibrated and good)

I read somewhere that cultures that have more words for shades of blues and greens, have brains that are objectively better at identifying minute differences in the shades.

I've never said 'teal' out loud in my life and I'm useless at it, but greeks get top marks for eg

A related quiz that might be interesting: fill the screen with random grid of colors, all close to BLUE and tell user to pick "blue". See how close people recognize 0x0000FF.

The author of the site says that he made it using claude. It would be interesting to find out what, exactly, Claude generated.

I would love a version of this based on orange. I've always felt my perception of orange is different from others.

Omg! A perfect time to share my story from before[1], where I lost a notebook at a big box store, and I had early on lumped the notebook in with greens, and thus described it as a "green notebook".

But some people, including the store employee that took my call, strongly felt it was clearly on the blue side and claimed not to have anything matching that description I only ever recovered it by going there in person and asking to see it.

(Fortunately, it had my name in it as a second check.)

Look for yourself: https://imgur.com/AlQAZBJ

[1] https://news.ycombinator.com/item?id=15092345

What function is being used to interpolate between green and blue?

Does it depend on the monitor's color setting?

I clicked "This is blue" whenever a green came up and "This is green" whenever it showed me a blue. Interestingly it didn't bother with any turquoises or cyans when I did this, it only showed me unambiguous blues and greens.

At the end it told me "Your boundary is at hue 180, bluer than 85% of the population. For you, turquoise is green." Which I would've thought was impossible to discern from my choices.

It is also possible that I say something is blue because rest of society says so. My blue can only be known to me

I had this result:

Your boundary is at hue 171, greener than 72% of the population. For you, turquoise is blue.

Of course there is a monitor and eyes component/biais tonthe measurement, but I also think this reveals something cultural. In France we call this color "bleu turquoise" so "turquoise" is not a color per se but a qualifier for the color blue.

Interestingly, at some point in the test I really had a hard time choosing between green and blue and precisely thought "it's a perfect turquoise so just between the two, how to choose?" so I closed my eyes and looked at it again and decided… green for this one! I wouldn't have expected the final result it gave me!

If you do this for green and yellow we can solve the "what colour are tennis balls" debacle once and for all.

This is a classic problem of trying to choose a single label for anything.

There are very few absolutes… maybe none.

I like this test applied to an apple. . With no bites taken, is it an apple? (Of course) Now take a bite. Still an apple? (Most would say yes). Keep taking bites until it is just a core, or an even just a seed. Then?

Maybe my favorite is just the boundary of one of us humans. Where is the boundary between me and not me? Obviously it’s on the outer edge of my skin. But zoom in a lot, and you have this blue/green binary fit problem.

Can we get this for yellow and green?

Ha, I made something in the same vein a few years ago: https://colorcontroversy.com/

At the end, with the vertical bar, I felt that it was quite a bit left than than where it should be, it needed to be further into the green.

Watch the results getting skewed in real time as night falls across the Americas and more people’s phone enter the mode with more yellow for low light conditions…

I'm actually of the opinion, that blue-green colors like teal or turquoise are both green and blue at the same time. Basically a mixture.

Having to pick just exclusively one - blue OR green - for such colors just feels, wrong and arbitrary?

You could also make a website that shows various shades of purple - and ask people is it blue or red? Well, both! Purple is a mixture of both blue and red. Why treat teal differently than purple?

I like that the test refresh your eyes with a random noise. But I think it should be a bit longer. My eyes still have a bit residue from previous color.

Teal is my favorite color and I felt attacked..

What does it mean when I get better and better at picking blues/greens on second or third attempts? Does it mean my ability to pick colors can be somehow influenced or improved?

Your boundary is at hue 189, bluer than 98% of the population. For you, turquoise is green.

That is interesting, I usually address my monitor to make it look darker and more lean toward warm color, guess this will affect the result

Today I learned that English doesn’t have an equivalent to the French world "bleu-vert" literally "blue-green" and meaning a colour in between blue and green so that it can’t be easily classed in either one (that’s not exactly like cyan which exists in French but is a precise color). Sixty percents of the time I was thinking "in between".

I used to have a lot of anxiety wondering if what my brain perceived as "Blue" was the same shade of "Blue" to other people. Like, sure, the sky is blue and a similar color to water for everyone.... but what if what I see as blue is actually red for other people and there is just no way to confirm because that is how our brain processes that frequency of light? I'm sure it isn't actually possible to confirm... but I was always interested in it.

Late addition to comment:

I just found this article that explains it well and has some theories on it: https://www.livescience.com/21275-color-red-blue-scientists....

Why in the world is .blue a TLD?

This explanation is trying too hard to affirm people’s vision capabilities and just say their monitor and naming schemes are different

Blue part of the color spectrum is the hardest for both our eyes and monitors to perceive, it extends the easiest out of the display range of both.

It is very valid to talk about our eyes, genetics, sex in this conversation too.

I sent this to two friends and we got 163, 164 and 165. We are all maniacs in the +90% percentile I suppose xD.

Your boundary is at hue 187, bluer than 98% of the population. For you, turquoise is green.

"For you turquoise is blue". Sure, it's even called in French "bleu turquoise", never "vert turquoise".

This very quickly got to what I'd call "turquoise", and neither green or blue so I got a bit stuck

Lol, I have protanomaly. The second color they show is one that I perceive as light gray, and my only options are saying that it looks blue, that it looks green, or to reset. I reset. Now it lets me see three colors I can distinguish until I get a series of greys (I'm just clicking to see it through to the end).

"For you, turquoise is green."

It very much is not, sir.

You have a meta header that sets a strong blue theme-color on the top of the browser. I feel like this might be biasing the results on iOS Safari because, compared to this blue, turquoise appears comparatively green.

Edit: it looks like the theme-color is meant to stay stuck as whatever the initial green/blue colour was. But for me, it shows as white if the initial choice is green.

My threshold was at 176.

I believe that an interval as threshold would be more interesting than a single value threshold. Perhaps if the user is shown N blocks from green to blue and then asked to drag&drop them to three buckets: green, not certain, blue?

I really like the way this shows the final result. Thank you!

I quit on the second one; it's a blue-green. Binary categorization is not sufficient.

One thing that's really cool is how this differs by culture. Ask a Russian, and you'll get an answer that may diverge from an American.

You might ask, "What makes an artist an artist?"

It's the seeing. Artists see differently (and there are some skills too of course).

Meditation, drugs and some other stuff change the way you see too. So perception is definitely a variable and not a constant.

So ya, the seeing of blue varies.

I did this test multiple times and I get a mix of both extreme results. I think my vote of green or blue on the current color largely depends on the previously displayed color. E.g. If the previous color was a strong green, I’m more inclined to see a color between green and blue, bluer than it actually is.

Is 175 the average score, or 1 std dev more blue than average?

We may never know.

I remember being in school and thinking that "what if my (color) is your (other color)" was a cool question, and then later I think I reasoned out that color is measurable so the actual color is objective, and the differences between different people is just like... rods and cones that are somehow different between people aka partial colorblindness.

So I don't know what this is.

I expected this to be about qualia. It's not. What I percieve to be red might be what you perceive to be blue, but we have no way to know this, because we will both call it by the same name. We have almost no insight into the qualia of others. Colorblindness is a chink in this armor. Not that I consider this a novel insight, it's something I thought of while a 10th grader back in 1984, and subsequently read about in books predating my own thoughts, such as Douglas Hofstadter's Metamagical Themas or Godel, Escher, Bach, or some other book I can't recall, though it seems quite obvious in any case.

Zima Blue ♥

At 0% brightness, my hue is 167, bluer than 85% of the population.

And at 100% brightness, my hue is 176, bluer than 69% of the population.

This means that turquoise is green in sunlight and blue otherwise.

I'm green red colorblind my result is "Your boundary is at hue 197, bluer than 99% of the population. For you, turquoise is green". I suppose that's because my cones don't detect green fully (without getting into the anatomic details of colorblindness). You should consider colorblind people aswell, this will make the results more interesting.

I think this website is broken. at the end it said that my blue threshold is way higher than all of the colors it showed me which I said were blue.

On my phone, turquoise is green for me, but on my laptop it's blue. I guess that's why it's called turquoise. The same thing happens with the purple spectrum. There's an unlimited amount of purple hues, ranging from red purple to blue purple. That's why there's pink.

If you do this in a fullscreen browser on a widescreen monitor, your peripheral vision will also come into play. You'll be able to see that the edges of the monitor are slightly different color than the center, because peripheral vision is less good at seeing color.

When I shrunk the monitor down to a narrower window, I was getting more consistent results than otherwise.

The About pages notes that this was built with Claude Sonnet 3.5. Nice to see these real-world LLM uses where people who aren't front-end developers can share cool things.

Nice. would've been cool if I could easily share my result similar to speedtest (as an example).

Interesting. Does anyone else see a band of green in their blue? My boundary is at 170. Greener than 85% of the population. This point looks like the transition between blue and green to me, to the right I can see the gradient go to blue then to green again, then back to blue. So there's a green band in the middle of my screen.

Why has this been upvoted so much? It's a completely useless test where it seems we all agree there are a bunch of turquoises.

Remember turning off your "eye protection" setting in android or you'll go left

If you guess the obvious wrong answer the choices between green and blue become more and more obvious. If you continue to guess wrong you end up with a boundary hue of 179 or 180 (bluer than 85% of the population). How is this possible? I'd suspect someone making the choices here would be colorblind and well into the 99.9th percentile.

where is the "its teal" button?

I'm reminded of xkcd's color survey map[1] and fun visualizations[2]. And a similar paper[3] with an interactive[4]. Note the variation between linguistic groups, and high variance among individuals. Might be interesting to compare the results of TFA. There's work on using google image search to learn color from names.[5] I was sketching a kids app for "use phone camera to name and collect colors".

[1] map https://imgs.xkcd.com/blag/satfaces_map_1024.png from https://blog.xkcd.com/2010/05/03/color-survey-results/ [2] http://www.datapointed.net/visualizations/color/xkcd-common-... [3] short paper with pretty pictures https://discovery.ucl.ac.uk/id/eprint/10088356/1/Wuerger_A%2... [4] https://colornaming.net/ [5] https://inria.hal.science/inria-00439284/file/verbeek09tip.p...

I know my blue isn't the same as it was before Cataract surgery. The world was a lot more yellow then. The benefit of not doing both eyes the same days in terms of complications and going blind is obvious. It gave me an A/B test as well to actually see the difference myself.

Hey I got 179, which the site says is 1 away from exactly halfway.

Being good at the difference between green and blue is normal to want and possible to achieve!

The websites shows a slope from green to blue across turquoise, but al most of this is almost certainly calibration error, and people being forced to say blue or green when they want to say turquoise.

The true graph is most probably a very small slope on the green and blue ends, and rectangle of measurement error in the middle. The "you are 70% greener" conclusion is a textbook example of false precision that ruins the science.

If the test is designed to select for non-blues in the HSL range of 150 and 210, how is it assigning boundary hues in a higher range?

At 192, I apparently have high standards for blue

recommend the game 'i love hue' for realizing one's boundaries as a happy fun surprise

I've taken the test multiple times, and ended up with my boundary being both greener than >70% of the population and bluer than >70% of the population in separate attempts. And I know my color perception to be good at distinguishing hue - it's just that I don't have strong opinions about categorizing it in this space.

I'm pretty sure there's some hysteresis going on - if we randomly end up in the ambiguous zone on the bluer side, we'll be pressing "blue" every time a small change happens, because it's basically the same color. Until the changes add up so much that we're out of the ambiguous zone on the green side - and now our "border" is far on the green side. But if we started on the other side, entering the ambiguous zone from the green side, it'd take a big cumulative change before we press "blue".

This is great and surprisingly consistent. Apparently I’m in the 98th percentile of how blue my cutoff is. I wonder if this is related to my favorite color being green (I’m perceiving more things as green because I like the color)

Where is the Hatsune Miku's hair option?

I think it's quite close-minded to call cyan green or blue.

I'm curious how the aggregate results from this test would compare to the exact same test named "Is my green your green?"

I could see the title influencing some of the more nuanced decisions in the middle.

Nice.

But... this reminds me of an issue many years ago when i worked in a design agency. A client's marketing manager had been sent printed samples with spot colours for sign off. She was complaining about the colours not being correct...

It turns out that someone in her team had taken photos of the printed items and emailed them to her because she was on the move. The correctly printed items were photographed in bad light with a camera phone, maybe it was an iPhone 3G around that time... which were then compressed and sent on email, and she was then comparing them on a poor quality PC laptop display...

Sadly she wasn't the only one to raise a similar issue. Another guy was notorious for zooming in on 72dpi low quality images and complaining that the logo wasn't legible or sharp enough :D

Ohhhh this is soo cool! I always wondered if my color perception is normal because sometimes i have the feeling that i do not have that much of saturation.

Still failed to find such a test but this goes into this direction. Maybe this comment can help me with this search.

Neat website, and lovely to use. I wonder if the test needs to be slightly more sophisticated?

My results seem to depend on whether the starting colour is blue or green. If it starts with blue I will categorise more of the turquoise as blue, and if it starts as green I will categorise more of it as green.

I got this: Your boundary is at hue 173, greener than 57% of the population. For you, turquoise is blue.

A lot of teal aand turquoise. Only saw blue at the start and green once.

"Your boundary is at hue 172, greener than 63% of the population. For you, turquoise is blue"

for a lot of them it was neither, it was turquoise or other colors, but thats not an option. I ended up at 68% because well that's what I was forced into. Like any survey that doesn't allow N/A.

Who wants the bet we'll see Is My Yellow Your Yellow on the front page tomorrow? Yellow and orange is another contentious issue.

There's a color called turquoise.

I was repeatedly asked to categorize a colour that I can only honestly describe as turquoise, as either green or blue. At the end of this process, I was told that I had failed to recognize turquoise. How silly.

Similar: XKCD conducted a color survey back in 2010 [1]. The results are detailed and the writeup quite interesting.

[1] https://blog.xkcd.com/2010/05/03/color-survey-results/

I feel like I achieved something by doing this. Thank you for sharing.

The universe is all about various spectrum and waves like sin. It's donuts and toroids all the way up and down, left and right.

Maybe that's because of much I learned about about color, but I very quickly get to a point where the correct answer can only be 50% blue, 50% green. Answering either blue or green feels wrong to me.

Is this test based on web rgb? I suggest use larger color space.

Love it, this is my result:

Your boundary is at hue 174, bluer than 59% of the population. For you, turquoise is green.

It seems like the test is starts with a clear green or clear blue and then devolves into cyan and asks if you think it's blue or green. I think it's blue or green hinted cyan.

I like the simplicity of this. There was a related game called Specimen that’s worth checking out. http://playspecimen.com/

Actually that is a test only , we agree both to testing my monitor only, and experiencing what is cyber space.. atleast soon I am ready it could be happen...

So at the end, I'm shown a full-screen gradient from green to blue, with a line showing where my personal boundary between green and blue lies.

Except that when I look at that gradient, it seems to me that the actual transition lies much further to the left, roughly in the middle of the screen: i.e., I'm being told that I consider a significant range of colours to be green that, on this final page, appear to me to be quite clearly blue.

That's definitely cyan, why did me have to pick a wrong color?

I think the end result phrase is wrong.

My line is on the greener side and it says im "bluer".

The semantics are at best unclear on this last sentence

There's an issue of language here. For me, an Italian, blue is dark and "azzurro" is light. I played the game assuming that "azzurro"=Blue but I guess that sensitivity is skewed by semantics here. You can try to capture mother language too and see how it affects the statistics

I expected this to be about the question whether your perception of blue might be like my perception of red. [1]

[1] https://www.youtube.com/watch?v=evQsOFQju08

Tested on full screen (24" display), got 175. Tested in small window, got 180.

This proves it, cyan is blue.

If you want to have fun, try printing a logo with nuances of green on your CYMK printer. Nuances on the screen become a flat blob.

"For you Turquoise is green" isn't an interesting result. There is a line at which a color isn't one of two options, it is another well-defined color.

It is a neat site, but I guess I don't understand the point of this is.

Another version with vehicles could say "To you a Van is a Truck", and you would get some results on how many people classify a Van as a Car or a Truck... but the question is flawed to begin with, and thus so are the "results".

I wonder how different the answers would be if simply the title was "is your green my green"

I got this :)

Your boundary is at hue 177, bluer than 75% of the population. For you, turquoise is green.

My partner and I argue about gray vs green all of the time. Id love this test adapted to color vs gray too!

As an anomalous trichromat I would love to see this for red and green as well!

When you show the distribution at the end, it'd be cool to be able to select my own threshold not based on the test results but my reaction in the moment to the color palette. I found that the distribution did not line up with where I'd draw the line.

I have a colour calibrated monitor, and landed at hue 181 which is almost dead centre.

Fascinating... so I then tried on my mobile device and skewed to the left at 171.

Retried the monitor, dead centre again. Retried the mobile device, back to the left.

What device you use, the brightness, capabilities, calibration, environment... will all change the outcome.

I take my green seriously.

Says my blue is 57% more blue than average. I'm all right with that. For me green is more exceptional than blue because the sky and large bodies of waters are blue.

This is like when you're at the optometrist and they keep flipping the lenses saying "better or worse?" and I'm like "better... no, worse. Hmm... well..."

Read the About section before commenting (The middle button after the test finishes).

First run

Your boundary is at hue 174, just like the population median. You're a true neutral.

Second run

Your boundary is at hue 174, bluer than 59% of the population. For you, turquoise is green.

Third run

Your boundary is at hue 174, just like the population median. You're a true neutral.

Now I have to try on another screen.

Fantastic, we always had disagreements about colours with my wife - now i know why.

Depends on the angle I'm looking at the screen. The top edge is visibly green while the bottom is clearly blue.

I'm doing it over and over again and getting different results each time, though the results seem to cluster around 174. I think part of the problem is that the response is primed by whatever you responded most recently, which means the final answer will tend toward (or away from?) whichever colour was shown first. (Might just be a me problem.)

For me, the results weren't even stable, but varied from run to run according to what colors were shown.

And the first time, it randomly showed me a bunch of blues and I thought it was broken. It told me my perception was bluer than 99% of the population.

But all the subsequent runs were very different, and not stable.

I don't know what is this.

I don't see the point in this is blue/green, when most languages have a name for the color that is between them. Pretending that teal, aka blue-green, aka cyan, etc, isn't a thing doesn't seem that useful if you are trying for a consensus. They should be asking, is this more green than blue or neither.

Cool. I got "Your boundary is at hue 174, just like the population median. You're a true neutral." with a MacBook Pro miniLED display.

Since the first color was right between blue and green, I refused to choose one or the other. I'm not gonna play that game.

I think it would be better to show a bunch of colors randomly and let you pick your blueness / greenness from that, instead of slowly converging to an answer with extremely similar choices near the end.

Is the data collected by this open? Would absolutely love to take a peek/contribute to analyzing it

(I'm trying to do similar experiments like this myself and I think it would be great if the data is published and we can like, reproduce each other's work/explore variants etc)

I did it twice and landed on exactly 168 each time. Can’t wait to show this to friends and argue.

Interesting. My wife and I both took this. We used the same laptop at the same screen settings. I'm slightly more bluer than she is, but we are both pretty squarely less green.

This is a interesting website and I finished the test. But when I am in testing I relized that I am a daltonism and most of color that between green and blue is gray in my world :D (it just as same as my browser title bar)

This is like showing a yellow screen and asking you if it's red or green.

For you, turquoise is blue.

I mean, turquoise is more like cyan, but it asked me to rate this color that's in-between green and blue as either blue or green so what can I do. It's like asking if orange is yellow or red.

By chance, I was reading earlier today about the dilemma of recreating 'Tyrian purple', aka 'Royal purple', since knowledge of making (something like) it from sea snails was lost long ago (long before it was 'created in the lab' by Perkin in 1850s, igniting the German aniline industry). And the old faded art works (back when it was high fashion) are not so reliable either.

The Wiki sez [0] that in 1998 the process was thought to have been discovered (who can be sure?) "True Tyrian purple, like most high-chroma pigments, cannot be accurately rendered on a standard RGB computer monitor" and shows 2 quite different swatches.

[0]https://en.wikipedia.org/wiki/Tyrian_purple#Modern_hue_rende...

You: Is this blue or green? Me: Yes.

Did it several times, I'm pretty consistently 178 with one outlier at 180.

turquoise is green and i'll die on this hill