This is the second post I've done today about Sam's hair. It must be awesome.
When Sam's hair grows out it becomes three different colors and looks like we dyed it. I've even had women stop me in the store and ask if I dye it. I promise you I don't. This is just what happens when a redhead reproduces with a person with super dark hair, that used to be blond when they were a child.
So the front of his hair is so blond that it's white, then it has a layer of red and then it's really dark around his crown. The red highlights in his hair are the exact color of mine, I've compared them. :)