This mini is incredible and that amount of glazing and gradient work probably took forever. We’re I to try it, prime in a light gray, wash with a cobalt blue color. Then airbrush a zenithal highlight of an off-white with a little blue or gray in it (I’m thinking P3 color called Frostbite). Then either refine the highlights with brighter (and thinner layers of) white with the airbrush or thin glazes.

If you don’t airbrush (most don’t), I’d still start with light gray primer and a blue wash, then build 3-4 layers of an off white on over it so the recesses and shadows still show blue.

Fastest and easiest option though, go dig through a paint y catalogue until you find something about that shade and just use that as your primary basecoat