Again you prove that English is an incomprehensible language for you. As for white being a color, that's debatable. It depends on who you're talking to, but some would say white is the absence of color. Others would say the opposite; that is, that black is the absence of color. Still others would explain that colors don't exist at all - or that what we perceive as color is really an ocular manifestation dependent on electromagnetic energy. But who cares?

As for people of color, or in this case "teachers of color," it is an American expression that defines non-whites and is non-derogatory. So, as for there being something with my language, as you claim, it is simply a manner of your lacking the sophisticated language skills you would like to believe you have but simply cannot admit you don't have. On the other hand, I'm always willing to learn. So, if there's something you feel I need to learn in terms of communicative or linguistic competence, please feel free to enlighten me.