Using two-tone paint colors can help you create a beautiful and interesting look in any room. Many people like to paint the walls one color and then use a slightly different color to paint the ceiling. One of the most popular techniques involves combining a neutral color with a primary color on the wall. For example, you could put white, black or tan on the ceiling and crown molding and then put a primary color like green, blue or red on the walls. For a warmer look, consider a combination of earth tones like copper, gold and brown.