"Pubic hair color: does it always match? Pubic hair color stands alone and doesn’t depend on the color of the hair on your head.
The color is determined by the amount of melanin (a pigment substance) in each hair, which can be different because the amount of melanin is different in different parts of your body.
In most cases, the color of your pubic hair is closest to the natural color of your eyebrows.
Throughout life, the melanin in your body decreases. This makes hair lighter and eventually grows gray, both on the head and in the pubic area."