Purple eyes are a real but extremely rare eye color. They are usually more of a light violet color than a deep purple. People with albinism, who have very little melanin in their eyes, are more likely to have purple eyes. Eye color depends on the amount of melanin the irises contain, and the more melanin present in the iris, the darker the eye color will be. Blue eyes are far more common in Caucasian cultures that originate from cooler areas of the world.

Regarding ingredients or materials, D&C Violet No. 2 (CI 60725) and Manganese Violet are synthetic dyes used as colorants in cosmetics. Gentian Violet is a blue, aniline-derived dye with antifungal and antimitotic properties. However, it is important to note that these dyes are not related to the natural occurrence of purple eyes in humans.