Add some dimension to the sofa with throw pillows. Choose solid-colored pillows in complementary shades or in neutrals, including taupe, beige and chocolate brown. Warmer tones, including burnt orange and gold, also pair well with maroon. Or, select pillows with a pattern featuring these shades.
Scatter home accents with maroon touches around the room. A maroon pillar candle on a bookshelf, a vase full of rich maroon flowers or a lamp with a maroon lampshade brings out the maroon in the sofa without being too monochromatic and overpowering.
Hang window treatments in a rich patterned fabric that features maroon. Alternatively, if your room is dark, choose a light neutral curtain, such as ivory or taupe, with maroon in the pattern. Or, go for a solid neutral curtain, which pairs well with the maroon sofa.
Add furniture in accent colors. You don't want all of your furniture to be maroon. Instead, include a chocolate brown or taupe chair and rich wood end tables. This mix-and-match look helps your maroon sofa blend in without overpowering the room.
Paint the walls a neutral shade. Avoid too much color by choosing a soft gold, light taupe or ivory for your walls. Keep the focus on your richly hued sofa; a competing shade on the walls will be too distracting.
Place a patterned area rug on the floor. Whether you have carpet or hardwood floors, an area rug underneath your maroon sofa can complement it. Look for a rug with touches of maroon, which will stand out as it sits under the sofa of the same shade.