Hm. With your existing color palettes, are you going for something mostly bold, something more natural...?

[tell him about polychromatic evidence, please, he's intrigued.]

Of course. When I was in Thorne I didn't see much. What are the villages outside of the castle like?

[Owing to the nature of the discussion, Alucard turns his sketchbook and pen around towards Annabeth, assuming that drawing is going to be the easier explanation here.]