Brown tones can be created by combining red, yellow and black pigments or by combining orange and black, shown in the color chart. The RGB color model, which produces all the colors on computer and television screens, turns brown by combining red and green light at different intensities. The names of brown colors are often imprecise, and some shades, such as B. beige, may refer to lighter rather than darker shades of yellow and red. These colors are less saturated than colors perceived as orange. Shades of brown are usually described as light or dark, reddish, yellowish, or grayish-brown. There are no standardized names for browns; the same shade can have different names on different color lists, and sometimes one name (like beige or chips) can refer to several very different colors. Web X11’s color list includes seventeen different shades of brown, but the complete list of browns is much longer. Brown colors are typically desaturated reds, oranges, and yellows that are produced using the RGB color model on computer and television monitors, and the CMYK color model when printing. Shades of brown can also be created by mixing two complementary colors of the RYB color model (combining the three primary colors). In theory, such combinations should produce black, but produce brown since most commercially available blue pigments tend to be relatively weaker; stronger reds and yellows predominate, giving rise to brown tones. Here are some common shades of brown.