My wife and I are constantly arguing about whether things are blue or green. She generally takes the “blue” position; I take “green”. Or vice versa, I forget. I have never known whether to ascribe the problem to genetic differences in the way we perceive the colors or to a cultural difference in where the boundary between “blue” and “green” falls in Holland and the US. (I mean, she’s wrong, obviously; the question is simply whether her error has a genetic or cultural source.) And then today I saw this optical illusion on Phil Plait’s Discover Magazine blog, via 3QD:
The blue and green spirals are, in fact, exactly the same color: RGB 0,255,150. Check it. It’s for real.
I think this shows that the reason for our disagreement over various blue-green objects is that my wife may see everything else in the universe as slightly orange, while I see it all as slightly purple, for either genetic or cultural reasons, I’m not sure.
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