Color-Coated Bookshelf

I've been wanting to organize my books by color since I saw it about a month ago on another blog, but thought it was going to take a long time. So I set out to finally do it today, and well here it is! It only took about half an hour to do, and the result is actually pretty neat to look at. I'm obsessed with books, so it was a lot of fun for me. Before, I had the extra books stacked on each other horizontally to the side. Unfortunately I don't have the room for another bookshelf even though I need one, so I started a makeshift bookshelf to the side, piling books on top of each other vertically. I changed it up, and think it came out better this way. What do you think?