Brown is the color of dark wood or rich soil. Brown is a composite color; in printing or painting, brown is made by combining red, black and yellow, or red, yellow and blue. In the RGB color model used to make colors on television screens and computer monitors, brown is made by combining red and green, in specific proportions. The brown color is seen widely in nature, in wood, soil, and human hair color, eye color and skin pigmentation. In Europe and the United States, brown is the color most often associated with plainness, humility, the rustic, and poverty. Brown is also, according to public opinion surveys in Europe and the United States, the least favorite color of the public.