Brown is a color. It can be thought of as a darker, typically desaturated shade of orange, and can often be produced by combining red and yellow with another color, namely blue.[4][5][6] In the RGB color model used to project colors onto television screens and computer monitors, brown is created by mixing the three primary colors: red, yellow, and blue. Specifically, red light is emitted at medium to low intensity, green light at a lower intensity, and blue light with the lowest presence in most shades of the color. In the CMYK color model used in printing and painting, brown is usually made by combining yellow ink with smaller amounts of magenta and black inks. The color brown is strongly associated with, and seen widely within, the natural world. Elements of the environment, such as minerals, soil, and wood, are frequently brown in color; consequently, many animals have brown pelts, scales, or feathers to better camouflage themselves within their habitats. Likewise, brown is often seen in the biology of humans; brown hair, eye color, and skin pigmentation are commonplace among humankind. The color is also frequently seen in plant-derived materials such as plant fibers, bark, fruits, nuts, and seeds.