Just play bass and don't worry what class the amp is or what color it is.
It does not happen often, but I must disagree on that statement. My barefaced cabinets have the cloth grille, which is silver and the sides are black.
My aguilar Tonehammer has a silver face and black sides. This is a really classy match.
I let go of a Markbass head which sounded and performed good, but the yellow and black color scheme did not really work with the vintage style of the barefaced cabinets.
However, as someone who played live before the first class D amps came out and who has done the schlep,
I've also done the blind test and was unable to discern between a lead sled power amp and a class D one.
Put me into the 'happy with class D' camp.