How do Creationists explain why people look so different from one another?

Assuming that we all came from Adam and Eve… how do Creationists (or anyone that doesn’t believe in evolution) explain why some people have dark skin, some have fair skin, some have red hair, some have black hair… etc, etc.

I wonder the same about animals, dogs for example. Dogs are a very modern and plain as day example of a eugenics experiment. We are able to shape and mold the traits we want our puppies to have (to some degree), to the point where there are hundreds of breeds of the same animal. How do people that don’t believe in evolution explain this sort of thing?