Carpet colors play a significant role in room design. Not only do they complete a color palette, but they can actually change the size of a room. If you have a large room, you can bring the walls in by using a dark shade carpet. In contrast, if you have a small room, you can push the walls out with a lighter hue in your palette. When picking the dark and light colors, try not to select one of the prominent colors in your palette. If you select a shade that is used minimally, your carpet will have more of an influence in your room.