I don't know if we are back peddling on color blindness, I don't know of a time where race wasn't a big way in which many people see others. I think there are a few main reasons for the continuation:
1. Racial Histories - As for instance, an African-American, you have a separate history than a white American.
2. Racialised statistics - Crime, wealth, education, voting and so on, are all popularly divided by race which leads to a greater racial focus.
3. Low requirement for "racism" - Culture, religion, language, food and many other things can't be criticised without risk of being called racist. So even if you are not actually racist, people will say you are and this puts a spotlight on "race" which goes beyond what it should.
4. News on racism - I think people are very interested in this topic for a number of reasons, racism and racial differences is constantly reported on.
There are many more though.
With 1 & 2, it's clear you can't fix past injustices and racial inequality without making race an important issue. The only way to proceed with an unracialised perspective is to forget about racial histories (i.e. All Americans (or insert nationality) share a history, not based on skin colour) and forget about racial inequality. I think for many people, it's inconcievable to do that because it's seen as unfair, an outlook that requires 1 & 2. I think, ironically, the racism is being perperuated by the people who care about 1 & 2 because reducing racism is not the main goal and people who see color blindness as the solution don't see this difference.
Reducing racism at this point, will not undo the fact that because of the past, many non-white races are disadvantaged in many areas across life. It is also requires forgiving these inequities which is hard for some. People still see others as part of a racial history, African Americans are former slaves and whites are former slave owners and without changing this outlook, you cannot achieve color blindness.
Of course, the people who I say are perpetuating racism probably don't see it that way but I don't see racism going away where race is extremely important and they're making it very important. Racism would go away if everyone was color-blind but the inequities would remain, I think for some it's more important to keep color-blindness out rather than forgive the inequities.