This concept actually makes sense, unlike the current color scheme. Change the black to a gray scale -- I have a feeling this would look better than purely back. Or, try the three color combo -- black, gray and yellow.
I suggest one color. For the sake of a concept that actually MAKES SENSE, use yellow on all bot types.
Do this for all BOTS!!; obtain Allie's approval (HARD ;/); implement the skin.
So much better than the purple **** ;/.