White hair, gray hair and hair colours
The appearance of gray hair44 years old among Africans for who hair color varies from dark brown to black
40 years old among Asians for who hair color varies from dark brown to black
34 years old among Europeans and Westerners (or Caucasians) for who hair color varies from light blond to black
The colors of human hair12 - The number of genes controlling the color of human hair.
8 - The number of natural human hair colors: black, brown, auburn, brown, red, blonde, gray and white.
10 - The number of colors used in hairstyle according to the scale of Eugène Schueller: black, brown, dark brown, brown, light brown, dark blond, medium blond, light blond, very light blonde, platinum blonde. Now there is a great variety of colors.
2 - The number of types of melanin contained in hair: eumelanin and phaeomelanin.