Human hair color used in physical anthropology and medicine to determine the shades of hair color. The scale uses the following designations: A (very light blond), B to E (light blond), F to L (blond), M to O (dark blond), P to T (light brown to brown), U to Y (dark brown/black) and Roman numerals I to IV (red) and V to VI (red blond). Brown hair is characterized by higher levels of eumelanin and lower levels of pheomelanin. Of the two types of eumelanin (black and brown), brown-haired people have brown eumelanin; they also usually have medium-thick strands of hair. Brown-haired girls
Kaiser Wilhelm Institute of Anthropology, Human Heredity, and Eugenics its ideas in "Mein Kampf". He also authored "The Rehoboth Bastards and the Problem of Miscegenation among Humans" (1913) (), a field study which provided context for later racial debates, influenced German colonial legislation and provided scientific support for the Nuremberg laws. Under the Nazi regime, Fischer developed the physiological specifications used to determine racial origins and developed the so-called Fischer–Saller scale. He and his team experimented on Romani people and African-Germans, especially those from Namibia, taking blood and measuring skulls to find scientific validation for his theories. During World War II, the Institute regularly received human body parts, including