Turn your two-toned paint job into a faint background that sets off a wall of framed images. Hang the images so closely together that their sides are nearly touching. Tile the wall with art from just-above-seating-level almost to the ceiling and nobody will ever notice the paint job behind it.
Hang a wall of curtains. Install a curtain rod near the ceiling and suspend floor-length curtains from the rod. Curtains can make an excellent wall covering in any room; for example, they are a great backdrop behind a bed in lieu of a headboard and add a sculptural element to living rooms with little architectural interest.
Decorate the offending paint job with furniture and accessories. Hang a giant mirror above shelves that reach halfway up the wall. Place ceiling-height shelves on both sides of a ficus or palm tree. Wheel a freestanding clothing rack in front of the wall and let your wardrobe be the focus of the room. Place a folding screen against the wall, and arrange a cluster of seating around it. The wall will hardly be noticeable behind your design.