Yeah - but it doesn't need to be too dark. Pitch black isnt great. It can affect the way your eyes actually perceive black on the screen. Most places recommend something flat, in a "muted" tone, like green or gray, which will "look" black in the dark.
For most of us, whose HT is also our livign room, etc. - painting the room too extremely violates the third principle of the WAF. Try going with one of the khaki colors or a subdued gray which (IMO) look very rich during the day, and very dark at night.
Unfortunately, my wife is making me go with something lighter than that in our new home - but if I had my way....
