Final answer:
Brown is created by mixing secondary colors together or by mixing a secondary color with a primary color, a concept from color theory used in art.
Step-by-step explanation:
The process by which a color like brown is produced through the mixing of two secondary colors or a secondary color with one of its constituent primaries is an aspect of color theory that is often explored in art. Brown can be made by mixing secondary colors such as orange (a mix of red and yellow) with green (a mix of blue and yellow), or by combining a secondary color with a primary color from its makeup. The resulting brown hue's lightness and darkness is determined by the relative amounts of color used in the mix. In subtractive color theory, when pigments of the three primary colors (red, yellow, and blue) are mixed in varying proportions, they tend to create neutral colors like brown, but due to impurities, they never produce a true black, and the mixture is more akin to various shades of brown.