This is a hell of a fun lit­tle test to take. There are 100 hue tiles arranged in 4 rows, and you have to sort them.

I only got four wrong, which isn’t par­tic­u­larly shabby. I won­der how they’re fil­ter­ing for dis­plays, though; I’m using a cal­i­brated CRT. I don’t know how the test would break down on an LCD or plasma display.

I found that it got more dif­fi­cult the longer I worked at it because of the after­im­ages; after a while every­thing just started turn­ing into grey stripes. I had to look at other things for a while to reset my eyes.

(No, that is not how it ended up when I was done with it.)

Via How.

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