If you are going to become a lawyer, then you really need to become a bit more educated on the basics.
White and Black can be considered colors under certain circumstances, and can be considered, "non-colors" under other circumstances. There is really no direct clause that would state, "white is not and will never be a color," or, "black is not and will never be a color." I'd suggest looking into the additive color theory. Black, according to science tends to have the need to suck up all of light (or color) and reflect none back (retina or vision), which is an example of a non-color. White is a combination of a lot of colors and it reflects light back which is an example of a color (also vision or caused by the retina of the human eye). Black is created by a mixture of a lot of colors, but it would not be pure black just a different variation of black, a lighter tone. That is just the breadth of it.
Are white people a people of color? Yes, they are a people of color. I think it boarders the lines of racism or downright prejudicial when people form such groups. However, soon whites will be the minority so those types of organizations will become nonexistent all together due to the racial coating they tend to have.