Whatever the reason, you need to pay special attention to the sofa shape. While it's tempting to choose based purely on style ...

A tan couch is also more suitable than a dark brown one with this colour scheme, although the latter works too. Find artwork for your living room Contemporary Living Room by Bagnato Architects ...

With a chocolate couch though, add more light brown and off-white/cream, and use black only as accents throughout the room. Eclectic Living Room by Etica Studio Peacock blue ...