I believe Russian has a general color term that covers aquamarine and other colors that blend blue and green.

Given that Smith encounters actual Gods or at least arch-Demons in at least four of his adventures, there's rather a lot of genre-bending even without his encounter with Jirel. (I won't count the one where he meets Medusa, since re-imaginings of classical monsters is a fairly common SF trope: Circe, OTOH, is a bit much)