It's not just race. Ugly people are incredibly discriminated against. Attractive politicians receive two and a half times as many votes as unattractive ones. Attractive people are far more likely to get hired and get paid 14% more. Unattractive people are twice as likely to be convicted for the same crimes in court, and have to pay damages twice as high on average.
http://lesswrong.com/lw/lj/the_halo_effect/