This picture doesn't belong here. Try posting this on the Halo Fanon wiki, because this is just stupid. All Elites have one color, not two. You're trying to make a picture of something that's inaccurate, and just plain stupid.
Actually, if you take a look at them in Halo 2, most of the Elites have a primary color with gray or brown as their secondary color --ED 14:13, 11 December 2007 (UTC)