This step by step shows the detailled coloring process, as the drawing & inking were done during the comiccon and I couldn't scan the stages as I was performing them (like I do for LUST panels for instance).
As I wrote in the final image, I learned a lot with the background and how to blend the character with the coloring, mixing them. See at the end the last evolution shows this clearly. I'm happy as this illustration seems to please a lot. So I'm on the right path.