Last night, I had a sudden inspiration and drew a picture.
This picture is my painting after scanning.
Then, I wanted to color the girl for more interesting, so I used Threshold in PS and Live Trace in Illustrator to fix and made her more clearly.
After that, I converted my picture into png file and put it in the PS for coloring.
I would like to use just black, white, red and brown for her. I tried for almost night for choosing right color. In my opinion, I thought just color her hair, necklace and her lips were enough.Here are my versions for my girl.