From advice on avsforum, I painted my bedroom which doubles as a home theater room with Dulux Snowfield Low Sheen (which any local paint-wallah who stocks it will mix for you from the Dulux shade chart). This is a shade of grey that apparently absorbs and reflects the primary colors evenly (as I understand it) thus offering accurate color reproduction. After a basic calibration of my projector (an Epson Home Theater 1080) HD content is very impressive on the 13' wide wall that doubles as a screen. The disadvantage is that the wall is not 100 percent flat so a little blurriness in certain areas exists even after proper sharpness calibration. But the fact that I can get a picture of that size without spending a bomb on a screen more than makes up for it plus. Plus the color is very pleasing to the eye, so much so that I've decided to paint he rest of my home with the same.