How did we get our hair colors?

Lanie came for a cuddle and was looking in the mirror.  I asked her how I had brown hair and she had her color.

She told me she got hers from the sky.  Then she said, "I got your brown hair from the sky.  I flew up like a bluebird and got your brown hair for you."
"Thanks," I said. "And how did you get down from the sky?"
"On a ladder!" she told me.
"Ah," I said. "Who was here first?  Mummy or Lanie?"
"I was," she said."I was here first and then I growed all the way up."