... progress is made!

Grinny is generally a gray on gray thing. Slate / gunmetal - gray/blue back with silver belly and highlights.

Yeah Grins has a pink nose. I don't know why! Lips and gums are dark gray/black. But the nose can be gray too if an artist finds that too obnoxious XD

Eyes are the main color, they are bright blue / aqua. The teeth are actually supposed to be metal (silvergrin = literal nickname!) but I usually just represent that as a light blue color.

I think Photoshop is better for this comic style coloring.

Work in progress... will be moved to scraps.