A while ago I needed to make samples for a Letraset demo. while looking around for digital images to colour, I came across this amazing person over on Deviantart
see her page HERE... she invites you to colour her lineart, just make sure to credit her.
so here are some of her images that I used..
Then I got to thinking about how I love to use different hair colours, not all of them natural looking. So I decided to make up a sample sheet of different hair colours. Feel free to try out these combinations.