My Brown Hair Turned Blonde!

I have naturally brown head hair. This summer, however, my hair has turned light brown and even blond in some spots (the bangs). I am a 15 year old male. This has never happened before and I am wondering if it is permanent.

The human pigment created from the melanin in our hair follicle for brown haired people is a pigment called eumelanin. If you produce a lot of the brown eumelanin, your hair will be brown, but if you produce only a slight amount of it, your hair will be blond. Maybe your brown eumelanin production is less as you get older. This is almost certainly a genetic predisposition of having a lighter colored hair and a change in the pigments that your hair is producing. Being in the sun can bleach your hair to a lighter color and turn a light brown color into a blond color.