I was just curious what color peoples backstage areas are painted. Im guessing that most are painted flat black, but ours, which are all quite old, are painted an off white color. I find it nice actually, as it is always bright backstage and is easy to see hazards with just a few lights on. I guess there are lighting reasons for painting stages dark colors but I have personally never found myself saying, "man, I sure wish the stage was black"
Granted, I dont do really get to do serious lighting design often in our spaces, for musicals and plays the choir teacher always hires a pro to do the lighting. (his pro is actually some kids dad who was a roadie back in the day)