Human hair color account for all possible shades of brown, blond, or red (for example, platinum blond versus dark blond/light brown), nor does it explain why hair color sometimes darkens as a person ages. Several gene pairs control the light versus dark hair color in a cumulative effect. A person's genotype for a multifactorial trait can interact with the environment to produce varying phenotypes (see quantitative trait locus). Natural hair color can be brown, blond, black, red, or white; all natural hair colors including grey, white and lightest blond, are shades of brown. The Fischer–Saller scale, named after Eugen Fischer and , is
Shades of pink (TPX)" color list, color #17-2625 TPX—Super Pink. Displayed at right is the color Rose Pompadour. This color was designed by Sevres for Madame Pompadour, in 18th century France. The color steel pink is displayed at right. The color "steel pink" was introduced by Crayola in January 2011, when the Ultra Hot and Super Cool set of Crayola colored pencils was fully introduced. "Steel pink" is a deep tone of magenta. Shades of pink This article is about notable tints and shades of the color pink. These various colors are shown below. At right is displayed the web color pink. At