Silver is the appropriate color for everything but speakers.

Black.

Yeah, it seems the vast majority of today's audio clientele won't take anything but black in a component.   It's something that enabled me to save a nice handful of cash when I pulled the trigger on a silver Mytek BB instead of a black one. It didn't hurt that, as for me personally, if there's an alternative to black in a component, I'll take it every time.

My preference is the champagne color Atma-Sphere used to have, like on the M-50 and early M-60. Elegant, tasteful, classy.

All my gear is black except the silver Pass Labs Xa-25.
Oh, the irony!  : )

Black