It's not really about colour of people though is it, it's always been about wealth, they tried it naively centuries ago in royalty to keep blood royal, as if it meant anything other than making our offspring unlikely to be born or malfigured.
Then again in the run up to WW2, the Eugenicists were out in force with a different take, a less naive and more robust one i might add, but it didn't last long as the Nazi's saw to it that it was a disgraceful practice.
Now again here we are, unlikely to be stopped by politics or stupidity, the wealthy will finally get their categorical biological advancement they've been longing for, for such a long period of history. If the rich can successfully advantage themselves in this manner, you can be sure that the real class war will begin.
A true race war.