skull colour

This is one of my line drawings of the skull in colour.

To do this i scaned the image and opened it in Photoshop and selected a soft brush and chose a light gray and went over the part that had depth to make them stand out. Then i selected a dark yellow and with the soft brush went over the parts at the top to give a light effect. After this i got a softer brush and a lighter yellow and went over the part i hadnt filled in.