A secret to using dark colors in a small space is rethinking how you'll use that color. Your perfect dark paint color may work best as a metallic, a stencil, or an accent wall.
Painting techniques like striping or color blocking are also an option for using color to visually expand a small home. Large horizontal stripes can widen or elongate a room, and look especially pretty using colors that are similar. Bold and contrasting colors are daring for a small space, but work best if one color is neutral and you limit your stripes to one wall.