Race won't be an issue the day when a person who is 50% white and 50% black won't be designated black, for whatever reason. It will become a historical note when every inequality for all causes involving multiple races isn't automatically blamed on racism.
Oh yes, my introduction to racism was when my buddy and I, he of a different race and both in military uniform, were not allowed to eat and drink in the same place. Education was completed when I was not allowed entry into a restaurant due to my race and that action was the accepted practice.