Jan says, "Cheapy-cheap Ikea Kilby bookcases fit the bill for my office but come with a back that is the dreariest color imaginable: putty gray. That said, when I got a second one, before nailing the back onto it, I marked it where the shelves would hit. I then painted each section a different color. It made a world of difference, changing the bookcase from merely functional to feature-able. It makes a nice showcase now and livens up a lot of previously dead, gray space. (Luckily, my original drab Kilby stays completely hidden behind my office door.)"
The boring Kilby
The snazzy one