Many years ago when we moved to a new state, we bought a house that had wallpaper in nearly every common space except the den which had wood paneling that was dark. The wallpaper was the ugliest stuff we had ever seen. We took all the wall paper off the living room walls, hallway, dining room and painted them all Rhinestone (Sherwin Williams). It was a pale gray with a touch of blue in it. So not dreary, but it brightened up the space. The floors were wood in the hallway, living room and dining room, so they provided color to the space. Our last house before the one we moved to about two years ago, we painted the rooms colors similar to OKW colors. We didn't realize it until after we were done. Kitchen was a pale yellow, den was a pale blue, living room and hallway were a pale blue-green.
Our current home is all white except for the master bath which we painted a seashore green color since we live on an island in SW Florida. We are going to paint more, but not now.