I want to make this look kind of like the Brush Gods from Okami, with the green on the legs made a darker grey or even black, the dark grey on the shell replaced with white, and the lighter green on the head and wings replaced with red.
>>1477650I made this to kind of illustrate what I'm talking about. So something like this, but not terrible and ideally without painting over all the shading of the original image.
It's a bit dirty but kinda fits with the artstyle.