Paint the wall a light color, like pale yellow, beige or white, which makes the blue velvet couch pop in contrast to its surroundings. Use wallpaper with a simple, light pattern if it fits with your desired decorating style.
Select the floor covering for the room. Wood floors in a light color such as light unstained maple lend a cheerful feel to the room, where stained dark wood in a cherry or coffee color lend a more formal appearance to the space. Add an area rug in a color like red, yellow or orange, which complements the cool tones of blue. Opt for carpet in a neutral color if wood or faux wood isn't an option.
Place other furniture pieces around the blue velvet couch. Choose matching items for solid pieces, like end tables and coffee tables. Opt for painted white wood to add an airy feel to a room, red, orange or yellow for a playful vibe or metal for a modern appeal.
Accessorize the blue velvet couch with accent pillows and throw blankets in tones of red, yellow or orange. Avoid other dark, cool tones like green or purple, which won't show up well against the blue background. Experiment with rough materials like canvas or burlap, which contrast against the soft velvet texture.
Accessorize the walls, tables and shelf space of the room. Use silver or black lamps and picture frames, avoiding gold, which will clash with any yellow in the room.