Using a monochromatic color scheme in a room with a gray carpet creates a sleek, modern look. Combine lighter and darker shades of gray, along with black and white. For example, paint your walls a lighter shade of gray, and cover your bed with white sheets. Choose black furniture, and make it shiny if you want the room to pop. Accessorize with silver or aluminum picture frames and vases and lamps with wrought iron, clear glass or white bases.
Use a warm color to create a vibrant, energized feeling in a room. All warm colors go well with gray. Yellow, orange and yellow-green are popular choices. One idea is to paint your walls in white and yellow stripes, or go with a yellow and white geometric or floral wallpaper. Choose a gray or white couch for your living room, and use yellow for your throw pillows. Add pops of yellow, such as in lampshades, an upholstered chair, a yellow painting or yellow window treatments.
Look to purple or aqua hues to give a room the feeling you're going for. Choose violet for warmth or aqua or blue for serenity. In a dining room with gray carpeting, paint the walls aqua. Pull the gray and aqua together in patterned upholstery for the dining room chairs. Dress the table with black, shiny accessories.
Neutral colors such as all shades of white and beige can be used in a room with gray carpet. . Paint all of the walls in your living room any shade of white. Lay a natural-fiber beige rug over the carpet. Complete the look by using beige throw pillows as accents on a white or gray sofa and armchairs.