Evolution of eye color and hair color

Okay I understand that the sun might be responsible for the evolution of human skin color, but how do you explain the change from brown to green to blue eyes? And how about black, brown and blonde hair? Not to mention frizzy to straight hair? How did this change? The sun has nothing to do with eye color, hair color, except that a lot of sun can make hair lighter but that actually contradicts the statement, and hair texture?
Please give suggestions. Thank You.

over a very long period of time people have evolved and now we have many different coloured skins, eyes, hair ect. this is because people from different countries are born with different colours. in one place of the world people have eveolved with dark skin and dark eyes, in places like africa, and in other countries people have eveolved with fair skin and light coloured eyes, in places like australia and stuff. this is widly due to the enviroment we live in. and also when people from different races/countries breed. its also down to genes. a mother and father could both have dark hair and brown eyes but have a baby with lighter hair and say blue eyes. because one or both of them were carrying the blue eyed genes. this is something that dosnt always happen though and can skip a generation or a few. which is why one family could have all brown eyed chilldren and then a blue eyed child as well.its basically all do to with our genes and the enviroment that weve evolved into.

it's the same thing as skin. A thing called melanin decides the darknes of skin, hair and eyes. the more melanin you have, the darker you are.