dark walls dark sofa, consider your furniture colors when selecting a wall color. This sofa blends into the walls even though it's a bluer/cooler gray than the walls. More contrast in the colors would set off the sofa.
I love the pairing of the lacquered inky blue wall that gives a liquid look paired with the softness of this camel colored velvet couch, oh and the zebra print and purple callas polish it off. trying to match a good color with zebra print-ms
Want to make a really bold rug work? Keep the other elements in the room subdued, so that the rug can take center stage. This colorful Moroccan rug (in a space from Bolig) looks especially nice against a dark floor.