Paint the ceiling. Instead of using the traditional white on your angular ceiling, add a splash of color to this space with paint. Choose a color that coordinates with the color on the walls; if the walls are a darker shade of blue, choose a lighter shade of blue for the ceiling. Stay away from dark colors, as they can close in the space and make the room appear smaller than it actually is.
Apply wallpaper that works with the design and color scheme of the room. If the room has a vintage French design, hang toile printed wallpaper on the ceiling. Instead of covering the walls of the room with wallpaper, display it on the angular part of the ceiling to make the feature stand out and to avoid making the space too busy. Cover the walls with paint that coordinates with the wallpaper.
Hang fabric on the angular part of the ceiling. Like wallpaper, fabric offers you an opportunity to display a visually appealing pattern on the ceiling and adds a billowy softness to the space. Use a fabric that suits the look of the room and hang it flush against the ceiling, or drape so that it creates a cascading effect on the ceiling.
Hang light- or dark-colored wood or whitewashed wainscoting on the angular part of the ceiling to add architectural interest to the room, giving it the look of a rustic cabin or beach-inspired retreat.