Young Red Haired Girl With A Pale Skin On The Sandy Shore

V - Dark or "brown" type - Very rarely - Sometimes darkens - 22–28
VI - Very dark or "black" type - Extremely rarely - Naturally black-brown skin - 29–36
Dark skin with large concentrations of melanin protects against exposure to ultraviolet light and skin cancers; light-skinned people have about a tenfold greater risk of dying from skin cancer, compared with dark-skinned persons, under equal sunlight exposure. Furthermore, UV-A rays from sunlight are believed to interact with folic acid in ways which may damage health.
In a number of traditional societies the sun was avoided as much as possible, especially around noon when the ultraviolet radiation in sunlight is at its most intense. Midday was a time when people stayed in the shade and had the main meal followed by a nap.