Windowless rooms, whether the result of a basement makeover or interior remodel, can be a challenge to decorate. The proper paint and accessories can make a success of a space without windows. Playing with light and fooling the eye are the primary tricks to making a windowless bedroom a pleasant retreat. Paint the walls a light and bright color. Blues and greens are suggestive of sky and water or grass and plants. A dark color would make the room appear smaller. Hang a large mirror or several small mirrors on one wall. Try to place the mirror so it reflects a doorway or opening to another room that may have windows or better light. Add artificial light. Table and floor lamps are functional and decorative. Shades that bounce light against the ceiling help prevent a cave-like feeling in the room.