So I did this little picture of Ally.

Then I decided to get a little creative and coelom her hair different colors. :3 (hence my art app and the color of her hair, the colors are sorta warped)

Red

Orange

Yellow

Green

Light blue (but I guess it's more teal)

Blue

Purple

Pink 

Hot pink

Light brown

Brown

Black

Gray

White (which the pre shading and highlighting didn't work on but I was too lazy to fix)

And rainbow! 

I'm not sure if I have a favorite, but they're all interesting. Which is your favorite?