If it is a wall-to-wall decoration, you can choose a light-colored flower wallpaper, which will make the living room appear larger. European-style decoration can be matched with vertical striped wallpaper; modern decoration should use cool colors, so warm colors will make people feel irritated if used for a long time. The color matching of the background wall should match the furniture, but be careful not to use more than three colors, otherwise it will look messy.