Basecoat with Matt black. Then zenital highlith with Matt Gray and finally Matt White.
Drybrush with white to highlight edges and give even more contrast.
Shade with Drakenhof Nightshade . The result is pretty dark and grayish so we need to add color.
Drybrush with Caledor Sky then light drybrush with Sotek Green but not too much.
Mix Caledor Sky with White 1:2 and drybrush to highlight edges. Then add even more white and do a final highlight with the resulting light blue color. Also paint teeth and claws.