The wall covering you choose can make a room appear bigger, warmer and brighter (or vice versa) and even hide imperfect elements. So it makes sense to spend a little time consider the best option for your walls and for your house. Take a cue from color. Color can set the mood in a room. To make a space appear larger and the ceiling higher, pick patterns with cool-color backgrounds, such as green, blue or violet. Soft cool colors suggest tranquility, while intense cool colors are fresh and dramatic. Warm colors — reds, yellows and oranges — live up to their name and make people feel warmer. These are a popular choice in colder climates and work well in north-facing rooms. The more intense the color, the more excitement it will give to a room. Play with light. In a north-facing room, dark hallway or windowless space, look for wall …