Do you have a ton of books? I LOVE this idea of arranging books in color coordinated order. I used this idea in my sisters guest room where she has a wall of built in bookcases. It's a great way of adding blocks of color to a room without having to paint or buy anything new. Arrange books by color based on hue. While rearranging books, go through and find old books that you no longer want and donate them to a local school or library!