A fun test to see what you think is blue

182 when I took the test on my iPhone 14 Pro in the dark.

175 when I used my Apple Studio Display in a bright room.

I’m guessing I’d come out around 180 if I were to take the test repeatedly under different conditions.

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That was interesting… and harder than I expected.

My boundary is at hue 167, greener than 86% of the population. For me, turquoise is blue.

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Our boundary is the same, but our percentage is different?

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We’re all taking the test and skewing their numbers?

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How fun!
Your boundary is at hue 182, bluer than 89% of the population. For you, turquoise is green.

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On the eye with the cataract, it is all green.

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My wife and I tried this on my iPhone 14 in a semi dark room. I perceive more blue and she sees more green…


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hue 187, bluer than 97% of the population

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Your boundary is at hue 178, bluer than 78% of the population. For you, turquoise is green.

Except, as a jeweler, it isn’t: the good stuff is on the blue side.

Edit: hey wait: what I call blue, you might call green, but we both agree that a particular stone has the “right” hue.

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