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Is my blue your blue?

492 pointsby theogravityyesterday at 8:24 PM336 commentsview on HN

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Night_Thastustoday at 1:08 AM

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.

dangyesterday at 9:39 PM

Related:

Is My Blue Your Blue? - https://news.ycombinator.com/item?id=41430258 - Sept 2024 (527 comments)

celerydtoday at 7:18 AM

This is stupid without color calibration, or even contrast/brightness levels on your monitor, which can turn these turquoise shades into other colors entirely.

oztentoday at 12:26 AM

Showing the completion screen and giving the ability to use a slider to pick the center might be more useful.

nubinetworkyesterday at 9:32 PM

I must be colourblind, most of those look the same on my phone.

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harrallyesterday at 9:54 PM

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.

red75primeyesterday at 9:48 PM

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."

HoldOnAMinuteyesterday at 9:27 PM

>> 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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drfloyd51yesterday at 11:07 PM

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...

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thepratoday at 7:02 AM

hue 174, "true median" .-.

dc96yesterday at 10:58 PM

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.

LastTraintoday at 4:39 AM

The hot debate in my house: is it yellow or green. Is there a test for that?

FarmerPotatoyesterday at 10:13 PM

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.

halaprotoday at 5:59 AM

They're all xanh to me.

merge_softwaretoday at 2:18 AM

This is really great. Love the chart at the end. Apparently I evaluate heavily toward thinking green is blue.

D-Machinetoday at 12:05 AM

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.

kazinatortoday at 1:29 AM

The test's gradient does not have even luminence/saturation.

It needs to interpolate between blue and green in the CIELAB color space.

caymanjimyesterday at 11:06 PM

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.

mboyesterday at 9:59 PM

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.

egonschieleyesterday at 9:46 PM

Warm blue vs cool blue is another interesting social question: https://www.ducktyped.org/p/a-colorful-controversy

jp57yesterday at 10:21 PM

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.

hyperifictoday at 4:11 AM

It just keeps showing me the same color over and over.

nox21125yesterday at 9:40 PM

>> 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.

Rapzidyesterday at 10:46 PM

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.

bojoyesterday at 11:25 PM

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.

wiljyesterday at 9:47 PM

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.

Xcelerateyesterday at 11:48 PM

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.

jamesonyesterday at 9:42 PM

"teal" is the name for color "Moderate bluish green"

https://en.wikipedia.org/wiki/Teal

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turtleyachtyesterday at 11:47 PM

> 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.

adxltoday at 12:58 AM

I used to own a house in California which I swore was peach, my coworker told me face it the house is pink.

cyostyesterday at 10:08 PM

It looks like this project got forked and updated further https://ismycolor.com/

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coldteayesterday at 10:39 PM

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.

Insanitytoday at 12:28 AM

Would be cool to see a gender distribution. Women perceive more colours than men, wonder how it impacts this.

dueltmp_yufsyyesterday at 9:48 PM

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.

layer8yesterday at 9:53 PM

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.

iterateoftenyesterday at 9:58 PM

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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malbsyesterday at 10:18 PM

Also no way to account for the variation of LCD displays. The same "colour" can look different on two different panels

timnetworksyesterday at 9:35 PM

> 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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SamInTheShelltoday at 12:29 AM

Showed me teal but only have options for blue and green. Teal ain't either.

tjwebbnorfolkyesterday at 9:46 PM

After 4 clicks, I can no longer decide whether it is green or blue. I would pick "neither" if it were offered

mncharitytoday at 2:31 AM

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...

w-lltoday at 6:28 AM

turquoise is green.

stephenlfyesterday at 10:25 PM

Fun. Are you accepting PRs? I would love to add a “share” button that shares the color I landed on

softbuilderyesterday at 10:20 PM

I want this but for blue vs. purple.

nektroyesterday at 9:42 PM

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

debpalashtoday at 3:47 AM

almost got fooled by blue being green or vice versa. nice experiment!

reassess_blindyesterday at 11:32 PM

Tried it on two displays, one I’m 82% green, the other I’m 75% blue.

cwilluyesterday at 11:31 PM

For some reason, dragging the window makes the chart re-animate.

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