If we are supposed to be "color-blind" then why do black women hate it when black men date white women?

This morning I was listening to the DL Hughley morning show on 98.7 Kiss FM. I don’t listen to it that often, i usually switch stations and listen to music. However, for those that don’t know, DL Hughley is a comedian who apparently is also a DJ on this radio station, one of the largest black radio stations in NYC. This morning he was talking about black women hating when black men date white women, and how it’s prejudiced of them, and we are supposed to live in a society that is veering away from prejudice (he was not denying that prejudice exists, just saying that the goal is to be color-blind). He also said that if black men did not date white women, then Obama would not be here, which was a good point.

I have heard before that black women don’t like it when black men date white women, and DL Hughley makes a good point: if we are supposed to not be looking at peoples’ color, then is this not prejudiced?