I once read in a book that the only three colors that have words for them in every language in the world are black, white, and red. Those are, on a primal level, the three most powerful colors. Only the more developed world langauges even have words for blue. Also, from what I've read, in ancient Egypt red represented desert, black was a color of life from the dark, fertile soil by the Nile, and white was death. I'm not 100% sure on that though since it was a long time ago that I read it, but since you have what looks like an ankh there then it may have some importance.