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
Shades of Grey on people. Doctors in this world are called "swatchmen", since they show of colour to their patients. Shades of green, especially Lincoln green, act as a narcotic, and are often abused as recreational drugs. Surnames and names of towns are usually derived from various shades of colour, such as jade, carmine and saffron. Protagonist Eddie Russett is a 'Red' sent to the outer-fringe town of East Carmine to conduct a chair census, which he speculates is punishment for a practical joke played on the son of a prefect. There he meets Jane, a Grey with an upturned nose and a