I'm not a guy, and don't have to deal with this bull, but I did ask about this once. They did a study (not for Enterprise specifically) that showed that white was the least offensive color. Red, blue, etc...could be construed as gang colors; pastels could be seen as too feminine and weak, yadda, yadda. White provides people with the impression that the people they are dealing with are dependable and trustworthy. Also, white can't offend anyone. Its the "right" color.

I have to say I loooooooooooove being female. Pink, purple, red, green, blue (not all together)--I can wear whatever I damn please.