Here's a "color IQ test" I saw some folks tweeting about on Twitter today: FM 100 Hue Test.
(Basically, you have to unscramble little swatches of color until they smoothly bridge the gaps between four pairs of colors.)
I have perfect color vision!
Hurray! ;o) That's more than I can say for my vision in general, but at least my nearsighted eyes can decipher color variation. (g)