0_Apprentice
I have brown hair.
1_Wizard
It has a categorized as higher levels of the dark pigment eumelanin and lower levels of the pale pigment pheomelanin
0_Apprentice
I wonder why brown or darker color hairs are more common than blond or red hair.
1_Wizard
blond" is first documented in English in 1481 and derives from Old French "blund, blont", meaning "a colour midway between golden 
0_Apprentice
So records show that blond hair didn't exist before? Do you think it's possible for new hair colors to naturally start existing then?
1_Wizard
Yes. Do you know that People with brown hair are often referred to as brunette, 