I'm working on some cycling jersey designs, which has prompted me to do a little research regarding color and heat intake. It's pretty common to hear that "wearing black makes you hotter." While that can be true if you are completely stationery, it can make you cooler if there is even slight wind.
Black does absorb heat from the sun at a faster pace than white, but black also absorbs the heat from your body as well. Throw a little wind into the mix and black is the better choice for wicking away the heat away from your core.
There are some interesting articles that go into more explanation.
"White clothing reflects sunlight, but also reflects internal heat back towards your body, so the net effect under identical conditions is less cooling than if you wore black."
via Straight Dope
"If there's even a little wind, black clothing is the better choice for those who want to keep cool, like goths who understandably don't like sweating through their make-up. So find something black to wear this summer."