Heh, I could explain the coloration a bit more than heavy heavy red.
Armor plating would be red, moving and mechanical parts would be a dark gray, at least for Fyunnen used armor.
Units in service to the Tur'lista directly, such as armor deployed within the palace grounds have a pearly white coloration with blackening of the moving parts. (Nice contrast, eh?)
Units in use by the Lmanel shamans would have a green coloration to the armor, and a brown coloration to the mechanical parts, or even a light camo scheme.
Units used by the LSDF are given gray and black schemes due to space deployment.
I'll let Tiffy handle the unit markings and whatnot though.