My small room prevents me from locating the 60" flat panel on a wall without a window so it's on a stand. I simply don't have two walls long enough to fit the flat panel and a couch on walls without a window. The window is small and on the east side of the house, I have little trouble with the room being too bright but have considered black out drape in addition to the decorative blinds.
I was thinking black or dark grey but haven't researched what dark color is best for the wall behind the flat panel.