That's exactly it; a good analogy. Let me also add "bleh".
An Apothecary and perhaps the Palantine Blades that decorate some armor sections platinum? But I think that is their original color (all of the legions, an off white, unpainted color of the armor) before they saved the Emperor and painted their armor "imperial" purple. Also, white shoulder pad with the Palantine Eagle (all this on pg. 103).