A wonderful way to add a pop to your room without painting an entire wall is to highlight or create architectural details with a complimentary color.
If you’re going for a black and white (or even neutral) theme, adding a bold color like in this room designed by Woodson and Rummerfield could be just what you need to add some interest! Think about how great an orange would look with a taupe wall in a very natural organic room. Or a bright teal to match an all white beachy look.
You can also use trim to pull out colors in the room that might go unnoticed. See how the blue trim on the door really pulls out the blue in the wallpaper? It really creates a continuity in the room without distracting from the overall design. It also makes pieces like the pillow on the chair work even better because the blue ties it all in.