My boyfriend isn't really good with colors. He's not color-blind, but confuses many of them easily. That might be the reason why he doesn't care about our (or my) toys' colors
I think my husband gets sick of pink just because I have so much of it. I think he'd like something different just for purposes of having variety. He actually uses my pink Flurry and doesn't complain about the color though, so I guess it can't matter that much!
It either has to match my wife's skin tone or stand out. So, say, a pink- white skin tone would be distracting but a purple or neon pink one would be copacetic.
Color matters very little to me, though I do usually try and vary up the color of the toys we have. But personally I could care less if I'm playing with a pink, yellow, black, purple, or beige toy as long as it is bringing pleasure to me or my partner!