To create standout room arrangements, choose an eclectic mix of furnishings and accessories that are noticeably lighter or darker than the deep color on the walls. Place light-hued upholstered furniture, shapely lampshades, and salvaged architectural elements against dark walls to give the room a sense of lightness. In this brown-walled room, look-at-me orange demands consideration. Presented as blocks of solid color, in a wildly patterned artwork, and as a statuesque shelving unit, orange supplies a refreshing counterpoint to the room’s more staid walls.