OT but I hate this kind of language. First, "white" is not a color? And much more importantly, so-called "white" people are not white at all. They call themselves white because some racist wingnut in the past designated the color traditionally associated with purity and light with his own race, thereby making it the benchmark and relegating all other people to off-colored aberrations. For example, I am of East Asian ancestry and thus naturally whiter than most Europeans, yet shall call myself "yellow" (or "PoC")!? If anything, it seems to me that blondes should be designated yellow. I could go on ranting but will stop here. Person "of color"... superficially PC bullshit that actually accepts the language of racial superiority and reinforces Eurocentrism. It couldn't be more wrong.
Really OT: From a political, civil rights, egalitarianism, etc. point of view I'd say I'm very much aligned with groups that push this kind of stuff. But I can't support it because this is what you push when you're more concerned with feelings than results. "Winning" is more important than anything else when it comes to equality and eradicating prejudice. I wish we were more focused on objectives than pushing terms like this or trying to crucify every film director on twitter.