One of the house projects I worked on this year was painting the room I call my office. It's a really small bedroom that looked dark and dingy because of the taupe/mauve paint on the walls. Honestly, I don't know what the previous owners had against color. Every wall in the house with drywall was painted this ugly shade. You can see it in the hallway through the doorway.
I had some leftover dark blue paint from my bathroom project and a sample container of light blue paint I wasn't crazy about. Neither amount was enough to paint a room or even an entire wall, so I thought I'd try painting horizontal stripes to see if it would make the room look larger.
I had just enough paint to do the two shortest walls in the room.