Chestnut (color) color called "chestnut" in Crayola crayons. This colour was also produced in a special limited edition in which it was called Vermont maple syrup. At the request of educators worried that children (mistakenly) believed the name represented the skin colour of Native Americans, Crayola changed the name of their crayon colour "Indian Red", originally formulated in 1958, to "Chestnut" in 1999. In reality, the colour Indian red has nothing to do with American Indians but is an iron oxide pigment the use of which is popular in India. Chestnut (color) Chestnut is a colour, a medium reddish shade of brown
Primary color The Natural Color System is also directly inspired by the psychological primaries. There are numerous competing primary colour systems throughout history. Scholars and scientists engaged in debate over which hues best describe the primary color sensations of the eye. Thomas Young proposed red, green, and violet as the three primary colors, while James Clerk Maxwell favoured changing violet to blue. Hermann von Helmholtz proposed "a slightly purplish red, a vegetation-green, slightly yellowish, and an ultramarine-blue" as a trio. In modern understanding, human cone cells do not correspond precisely to a specific set of primary colors, as each cone type responds