Is there any reasoning behind the way that covenant weapons are designed, color wise? For instance human weapons seem to be the generic gray color with a few exceptions, Jiralhanae weapons seem to follow black with orange lights and Promethean weapons are silverish-grey with orange lights. Covenant weapons seem to use blue like the plasma rifle, purple - carbine, red - concussion rifle, gold - fuel rod.
I thought that maybe color represented power or manufacturer, has there ever been a reason behind this?