Have you seen the Technology Connections videos on colour? They don't answer your question directly, but do touch on how light is perceived and how we categorize colours. Highly recommended.

It's intended as a subjective test to determine your personal threshold where you start calling a color either green or blue. Of course there are a bunch of confounders, which they address in the test explanation.

My wife and I both took it using my phone. What she would call turquoise looks quite green to me, suggesting she could be more sensitive to blue light or our personal definitions of colors differ.

It ends with "For you turquoise is ___". Turquoise is turquoise. If I had to choose, I guess it's blue, and so my line is gonna be between turquoise and green, but it's actually turquoise. But I can see an argument for turquoise being green.

Ultimately, it seems like the actual question the test answers is "If you had to choose, do you consider turquoise to be blue or green?"

Depends on whether you think cyan is blue or green, I guess... It's both and neither.

This is useless: different screens will show colours differently, so your blue will change from screen to screen. How can you compare results with people who have different screens?

I wonder how the results would differ if I did it one eye at a time, because my right eye sees more blue than my left usually.

Over the span of time it would take to check the entire population, the backlights or LEDs or OLEDs would start to wear out, slowly affecting the results. 😅

Do you have automatic brightness adjustment on?

I got bluer than 93% of population with phone screen at 50% brightness.

I got true neutral with phone screen at 100% brightness.

I had already set colors to natural from day one.

That is what I thought too, but my result ended up being at the exact point on the OP photo I thought (prior to trying the test) that the color shifted from being blue or cyan or turquoise into being definitively green. Which the test says is the median.

Really it seems like it is gauging whether or not people think the mid range is more green or blue

I got 177, 176, then 184, so I figured I'd go one more time and got 176 again (then 179 because 5 is a nice number)

Then I tried on my phone which is currently lowest brightness and thought for sure I'd get different results than my computer monitor. 179, 177, and 176

I am, and got similar (on two monitors). On the bright (heh) side you likely have better distance vision and night sight (more rods, less cones).

Why isn't there a “this is turquoise” option?

Or the possibility of marking it as both green and blue? (Or neither, whatever floats your boat.)

RGB #00FFFF is objectively as green as it is blue (well, in my screen the midpoint at which I'd be more likely to call it green seems to be at or around #00FFF5 ± 5, but that's probably due to the screen being imperfect)... it makes no sense to call it (or sufficiently close hues) one or the other...

I might be colour blind

Did it twice. 174 and 175, so consistent at least

That what I have always wondered. Is there a easy to tell if all of our brains perceive the same colours? Maybe whatever I see as "blue" (~400nm) someone else sees as what I would call "yellow" but all they have ever known to call it was blue. Same wavelength but the brain interprets it differently.

We could all have the same favourite colour but just call it different things.

Also, as we age the lens in our eyes starts to yellow, diminishing our ability to perceive blue. There is speculation that this is why many artists use more blue in their paintings when they get older - they're painting to match what they imagine, not what they see.

Once upon a time I had a Viewsonic monitor that had a Pantone calibration card. Very nice monitor. Not terribly expensive but more than middle of the road.

Yeah test was the wrong word. The ones I saw weren't more green or more blue, they were just darker or lighter versions of the colour in between green and blue. Lol

Is your green my blue?

And my green your blue, too?

Could it be we have differing views?

The test would work on any monitor as long as everyone is taking the same test on the same screen.

Some are hard to tell, but still distinct enough to be more green or blue.

Its for fun though, not an actual test.

Yeah. I saw cyan and to me, that's neither green nor blue.

Anytime color perception comes up, it's good to point colorblind isn't a lack of colors...

It's just different colors:

Red-green color blindness is caused by an unusual form of a light receptor in the eye, which is sensitive to a different range of colors than normal. This variant type of receptor makes it harder to distinguish among red, orange, yellow, and green. The resulting shift in color perception bestows extra sensitivity to other hues, however, as the researchers demonstrated by asking subjects to rate the similarity of 15 circles painted in tones of khaki. People with regular vision struggled with the test, while color-blind men aced it. The findings lend credence to the theory that people with red-green color blindness make good hunters or soldiers because they are not easily fooled by camouflage. The researchers hypothesize that the variant form of receptor could be an evolutionary relic from the time when early humans needed to spot predators or food hidden in branches and leaves.

https://www.discovermagazine.com/in-combat-stick-with-the-color-blind-15907

People who suck at red/green, are the ones that never understand why all the different colored khakis were always mixed together on the rack.

People just always assume what they perceive, is what every one else does too.

This is a hard test because most of the colours presented don't look green or blue, is like a perfect blend, and hard to answer