Identify your color scheme. Brown is a warm hue and adapts particularly well to similar warm colors such as red, purple, orange and yellow. Lighter hues of brown work as a neutral tone to build a cool color scheme with colors such as blue, gray and black. Pick one or two colors that blend with the hue of your brown-themed furniture and accessories to use in your window treatments.
Examine the use of patterns in your room. If you have an abundance of layered, contrasting patterns, curtains made from solid or minimal pattern will balance the business of a room. Plain rooms, with solid hues, will benefit from curtains with a bold floral, striped or geometric pattern.
Look at the overall color in the room. Add another color to monotone or dyadic color schemes to increase the variety of hues in a room. Make a signature statement with your curtains by using a bold new hue in the fabric.
Incorporate a textured fabric in your curtains to add tactile and three-dimensional interest in your room. Fabrics made of jersey knit, silk or a cotton blend puddle and drape well, whereas fabrics made from velvet, damask or suede have a luxurious and soft look and feel.
Lighten a dark brown room with sheers made of lightweight, translucent material. Chiffon, tulle or linen can diffuse the harsh angles of a window while allowing natural light to brighten a dark room.