Differs from person to person.
no, humans cannot change thier hair colour naturally.
2 parents with brown hair can produce a child with red hair
Two parents with brown hair can produce a child with red hair
Same reason humans' hair changes color when they get older.
Different languages. Hair color. Race...............
Same reason humans have diff. colours of skin, eyes, and hair, pigmentation.
Blondes- with approximately 140,000 hairs on the head. Brown- 110,000 Black- 108,000 Red- 90,000
Genes. When humans were created (however you think, god, evolution, ect.), they ended up with hair of grey, blonde, ginger, brown and black. As humans have moved on, they have usually inherited their parents or grandparents hair colour. So you would have to travel back for billions of years to change this.
His hair color is blue
Humans are typically 99.9% alike to one another, but some genes like the hair color or the eye color are different.
It's normal for humans to have hair all over, though in some places it may be very fine and considerably lighter in color than the hair on top of the head.
"What colour is your hair?" is correct.