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Comment by avodonosov | Hacker News Reader

Great site.

I wish they had a Turquoise option.

I assume that would defeat the purpose, since turquoise is blue and green. And while for most the more initial more obvious blue or greens are easier, when close to the middle of in between blue and green (aka turquoise), that's where it can get confusing, and this test helps to show if your perception leans more towards blue or green and by how much.

Then maybe allow non binary choice. Like 0.7 green / 0.3 blue. Becase when I see a mix of blue and green and there is only two buttons, I choose green. Or maybe I should treat the buttons as "> 0.5 green" and "> 0.5 blue".

Imho violet vs purple are difficult to distinguis (classify), maybe they can add a page for that too. These two colors are not spectral neighbors, so may be more interesting.

One more note - modern RGB displays do not produce real turquoise, just combinations of G and B. Are RGB(0,1,10) and RGB(0,10,100) on the same position of the scale between green and blue? On the final diagram, how is the horisontal axis computed?

> Becase when I see a mix of blue and green and there is only two buttons, I choose green. If you choose green, because you see a slight more tint of green than blue, yes, that's what you should do for this particular test. Just as you should choose blue if you see slightly more blue. For many when close to the middle hard to tell since have to go with your eyes and gut. But if anytime you are unsure if blue or green, if you always choose green regardless, then the test presumably wouldn't provide accurate results. > Or maybe I should treat the buttons as "> 0.5 green" and "> 0.5 blue". Yes, with each color they show, it's asking you if you see green (aka more green than blue) or blue (aka more blue than green). With the test starting off easier and then shades much closer to the middle (either left or right of the middle) where much harder to tell without a color picker, and everyone's eyes will be different and close to the middle you will probably see most as either blue or green.

It really would be helpful to have the x and y axes labelled.

Yes.

The horizontal axis is Hue of the HSL color model, as I learned from the About section (the middle button after the test completes).

> Then maybe allow non binary choice. Like 0.7 green / 0.3 blue. Becase when I see a mix of blue and green and there is only two buttons, I choose green.

And (as far as I understand), this bias is what the test is supposed to detect.

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