Ahhh I see what you mean. Hmm... Maybe I can redo the background. I think I understand what you mean, yeah, like maybe a midtone blue, something like this:
[link]And yeah, some of the hatching was messy because I was lazy and I stink at drawing straight lines on my tablet, haha....
And thanks! This did help. I like doing dramatic lighting, so I'll definitely keep what you said in mind.