Down-to-Earth it is. Brown is a natural, down-to-earth neutral color. It is found in earth, wood, and stone. Brown is a warm neutral color that can stimulate the appetite. It is found extensively in nature in both living and non-living materials.
Culture of Brown: Brown represents wholesomeness and earthiness. While it might be considered a little on the dull side, it also represents steadfastness, simplicity, friendliness, dependability, and health. Although blue is the typical corporate color, UPS (United Parcel Service) has built their business around the dependability associated with brown.
The color brown and its lighter cousins in tan, taupe, beige, or cream make excellent backgrounds helping accompanying colors appear richer, brighter. Use brown to convey a feeling of warmth, honesty, and wholesomeness. Although found in nature year-round, brown is often considered a fall and winter color. It is more casual than black.
Using Brown with Other Colors
Shades of brown coupled with green are an especially earthy pair, often used to convey the concept of recycling or earth-friendly products. Very dark brown can replace black, adding a slightly warmer tone to some palettes. Brighten brown with a mellow yellow or rusty orange. Go smart but conservative with a mix of brown and deep purple, green, gray, or orange-red.
Info: About.com, picts: Webstash album color brown, original source in album.