See this latest pic on Ben Pentreath's blog: books don't HAVE to be orderly on a bookshelf, especially if there are other bold pieces/colors in the room. I live with my books and pull them out and sometimes haphazardly put them back on the shelf. I don't want to pull all of my bks to the edge of the shelf one by one! It seems fake to me.
Three young girls and a boy are reading on bean bag chairs in class, each chair a different color: green, red, teal, and blue. Behind them are two bookshelves, and on the wall are mini posters with different colors written on them.