Paint walls white or eggshell, to provide a backdrop for the bright, wild colors of Mardi Gras.
Shop for a comforter with the traditional Mardi Gras colors of purple, green and gold. If you cannot find a comforter in those colors, choose a bedspread in a solid green, purple or gold, and highlight the bed with toss pillows and shams in the other colors.
Decorate your walls with elaborate Harlequin, jester and half-face masks. Feathers, sequins, ribbons and trim make the Mardi Gras mask a work of decadent art.
String loops of green, gold and purple beads over lamps, doorknobs, or on the edges of cabinets and bookshelves.
Hang posters with Mardi Gras images on your walls. You can find a wide range of possibilities at websites such as AllPosters.com.
Keep furniture simple with black or white finishes. The accessories will provide enough color and you don't want your room to become tacky or overwhelming.
Look for room accessories such as trash basket, desk organizers or lamps in the Mardi Gras colors of purple, green and gold.