Melyssa, owner and designer of Whimsie Doodles, created an awesome tutorial for coloring hair and skin.
Along with the tutorial she produced a sheet of 'Doodle heads' for you to practice on. You can see the tutorial HERE. I have found the tutorial to be very helpful. If you like the tutorial please leave a comment for Melyssa so she will know she's appreciated. Thanks. LC
5 hours ago