Originally Posted by
GrumpyDiver
Neutral colours; nice way of saying anything between pure black and pure white for sure. Anything else will add a colour cast to the light that reflects off the walls or ceilings; but frankly as long as the colours are close to neutral, it will probably work out okay.
Bright, reflective surfaces reflect light. That is more of a problem in a smaller studio, as your subject and camera will be closer to the walls and ceiling; adding stray light into the equation. Yes, you can handle that by flagging off these issues, but the less you have to do this, the easier it will be on you.
Dark, mat walls will absorb light, but this is not to everyone's taste. I've shot in a couple of pro studios; both had 16 - 20ft high black ceilings and black walls. These were an absolute pleasure to work in; I've booked in some more time in a few weeks to practice my studio portraiture techniques.