People notice red immediately when they walk into a room. It immediately grabs the attention. Red is also known to stimulate appetite, which makes it a great choice for dining rooms. No matter which room you choose to add some red to, rest assured you will be adding drama and stimulation. A rusty red wallpaper pattern adds subdued warmth to a study or library and is a perfect complement to wood bookshelves and chocolate brown or worn leather upholstery.