I agree with your post generally but the above I vehemently disagree with. This notion that we should be 'colorblind' is a.) impossible, b.) counterproductive and c) has a little bit of a racist edge to it.
Part A. that's like saying since we as a culture still discriminate against women that we should not see sex. Is that Angelina Jolie or Don Knots? I can't tell because I don't see sex.
Part B. Whites, blacks, hispanics of all flavors, East Coast, West Coast, North, South, we all have our own sub-cultures, customs and ways we relate. Having colorblind be the goal is saying that not only do we seek to impose ignorance of our surroundings on ourselves and cease to be aware of these little differences but, and this is the more dangerous part, that we should all try and act alike so that this we are able to be colorblind.
As for part C. the word color has a lot of meaning for blacks and other minorities and many refer to themselves as a 'person of color'. So when the catchphrtase sweeping the nation is that the goal should be to be color blind some take this to mean that goal is to not recognize or even see blacks, hispanics etc.