Cat chins are gray and black because they have many glands on their bodies, which secrete a substance called keratin. Keratin is a chemical that can change the color of skin and hair. Keratin pigments are usually black or brown in color, so cats' skin and coat tend to be black or brown.
However, some cats' skin and hair will turn gray. This is because the cuticle pigment on their bodies is lighter, or their skin and Hair contains other chemicals that can change its color. Therefore, cats’ chins are gray and black because of the combination of keratin pigments and other chemicals on their bodies.
