I have brown hair, my sister says it is the second most common hair in the world
i have blackish hair
Most brown hair can vary to a black or dark brown sometimes.
so what is the most common hair color, black?
Yup! and people with brown hair are often referred to as brunettes.
what makes the color of hair?
It is the pigmentation in the hair. The word brunette is the feminine form of the French word "brunet".