I added a few shades of brown on the dragon in order to start seeing the muscles and deepness in the whole body. I always work with my pale colors going toward my darkest so that I can adjust myself as my work progress. Why work with colors when I know they will be covered with black at the end, would you ask? Simply because I rarely work with my opaque black, I always use my transparent tint black so that it looks more natural always showing a hint of the lines and shades in the background.