Create a monochrome room by using only black and white in the decor. Paint the walls white, and add black stenciling or vinyl to add dimension. Alternatively, paint white and black stripes or another pattern on the wall. Accessorize the room with black or white furniture.
Paint the wall a deep, rich color, such as dark blues or reds, to give the room an edgy, sophisticated look. Add texture the wall by sponging on another color, such as black or grey, which will deepen the color and give it an Old World look.
Use bright, bold colors on the wall to create a fun playful look. Pink will provide a sexy, feminine look, while bright green or blue are more neutral. Add touches of black to the walls with stripes, patterns or long floating shelves to complete the look.