The Fitzpatrick Scale is a numerical classification schema for the color of skin. It was developed in 1975 by Thomas B. Fitzpatrick, a Harvard dermatologist, as a way to classify the response of different types of skin to 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.
Scale
The Fitzpatrick Scale:
Type I (scores 0–6) Pale white; blond or red hair; blue eyes; freckles — Always burns, never tans
Type II (scores 7–13) White; fair; blond or red hair; blue, green or hazel eyes — Usually burns, tans minimally
Type III (scores 14–20) Cream white; fair with any hair or eye color; quite common — Sometimes mild burn, tans uniformly
Type IV (scores 21–27) Moderate brown; typical Mediterranean skin tone — Rarely burns, always tans well
Type V (scores 28–34) Dark brown; Middle Eastern skin types — Very rarely burns, tans very easily
Type VI (scores 35+) Deeply pigmented dark brown to black — Never burns, tans very easily
From:
https://en.wikipedia.org/wiki/Fitzpatrick_scale