The Fitzpatrick Scale (also Fitzpatrick skin typing test or Fitzpatrick phototyping scale) is a numerical classification schema for human skin color. It was developed in 1975 by Thomas B. Fitzpatrick, a Harvarddermatologist, as a way to classify the response of different types of skin to ultraviolet (UV) light. Later, it was updated to also contain non-white skin types. It remains a recognized tool for dermatologic research into the color of skin.
^Fitzpatrick, T. B. (1975). "Soleil et peau" [Sun and skin]. Journal de Médecine Esthétique (in French) (2): 33–34
^Pathak, M. A.; Jimbow, K.; Szabo, G.; Fitzpatrick, T. B. (1976). "Sunlight and melanin pigmentation". In Smith, K. C. (ed.): Photochemical and photobiological reviews, Plenum Press, New York, 1976: 211-239
^Fitzpatrick, T. B. (1986). "Ultraviolet-induced pigmentary changes: Benefits and hazards", Therapeutic Photomedicine, Karger, vol. 15 of "Current Problems in Dermatology", 1986: 25-38