The picture doesn't care.
Black is suppose to be more "professional" looking- but look on the sidelines of football games. Many of the pros are using Canon's silver "professional" line of telephotos.
Black is suppose to be "less noticable". Right. Picture the wedding photographer with battery packs hanging off him, big ole hand grips to hold the camera and some huge honkin' strobe that flashing like crazy every few seconds lighting up the whole place... but hey, nobody notices him because he's got a black camera, right?
If the color were that important, all movie cameras would be black.
Get real.