I haven't looked at your colours yet so this will be dependent on your preference on shades of purple but there should be a way to have a brown/tan/purple/burgandy combination which would incorporate both vampire/supernatural/magic & earth without including the obvious green = nature. The purples would have to be more from the red family than blue (so be more pink) to match I think
I can also put together this colour scheme if you'd like a visual of what I'm suggesting?
