Pink is such a bubbly color, don't be afraid to double-dip from the pink paint chips to complete your color scheme. Combine two different shades of pink for a pink on pink on chocolate brown color scheme. Picture a cotton candy tinted wall with lush, brown fabrics and tie it all together with hot pink furniture for a bold splash of color that will wake up the room.
Tone the pink and deep chocolate brown down a bit by introducing lighter shades of brown. Sandy or tan colored furnishings can neutralize the room to bright the stark contrast down a level. One way to achieve this is through wood furnishings stained a chestnut color and polished to a shiny finish. Alternately, go with a camel colored leather or suede upholstered seating for a luxurious atmosphere.
The complement of any color is the color found at the opposite side of the color wheel. Pink, being a lighter hue of red, is perfectly complimented by green. Choose a shade of green of the same intensity as your shade of pink. For example, if you're going with a pastel pink with mint green. If a rich dusty rose is your choice, play it against sage. Brown, being a neutral, will work with any color, but combined with green it infuses the room with an earthy mood.
White can lighten and brighten a room in which chocolate brown and pink are the dominant colors, lending a bit of a lighter, airy appearance. Keep in mind that white comes in many different shades. A crisp, bright white is a cool shade that can make the room more relaxing and modern. An antique or creamy white keeps in line with the warm tones of pink and chocolate and brings in a vintage appeal.