The Com Guards simply paint their vehicles white for official occasions and use appropriate camouflage for combat.

Per FM: ComStar, page 17.

Other references:
Exterminator, Battle of Tukayyid (p 178)
Phoenix Hawk, Battle of Tukayyid (161, back cover)


Insignia:

The insignia of the Third Army shows a hooded green falcon perched on a black gauntlet. Per FM: ComStar, page 24.