It's best to stick to neutral tones for the carpet when you have a brown sofa. Colors like light grey, pumice, or stone. Yellow and orange can work well but try and keep tones on the more muted side. Grey compliments every shade of pink, from bright, hot pink to delicate pale shades. Brown furniture has become synonymous with dated. A few pieces of dark wood home or office furniture can add depth, richness, and soulfulness to a space.