I painted this blue in my youth to depict a snow- or ice ghoul. Why blue? Well, the blood in its body runs cold (obviously! lol!).
It was also an early exercise in azimuthal lighting to some extent.
The base coat is nothing more than ultramarine blue, with several dark blue wash layers added on top to give a bit of depth. The upper surfaces on the face and chest were then picked out in ultramarine blue, and then layered up with a mixture of electric blue. I was particularly pleased with the face on the ghoul - in spite of the pure white eyeballs. The tongue is suitably snow-covered dirt flavour, but the weapon clearly needs a bit more work to bring to a good standard.
The overall tone of the blue is pleasing to my eye even today and I remember fondly some snow based Dungeons and Dragons adventures where a group of these ghouls persistently tailed and tried to eat the PCs (repeatedly) only to be chased away and scared off by large bonfire-related hijinks and fire-based magic.