The belief that black is hotter is a myth. If you feel a difference between black and white in the heat then it's in your head. I've been through this whole subject in the sportbike scene concerning leather jackets and track suits. There have been numerous studies shown disproving the myth. If anything, black is better because you'll cool down faster in the shade. Bedouins who live in the desert wear black robes. If it was hotter they wouldn't wear black.