Content guidelines for backgrounds?


First off, I am sorry if this is in the wrong category, I did not know where to put it. Anyways, where can I find the content guidelines for backgrounds? I’ve found the content guidelines for cover art, but not for backgrounds. I assume they are the same, but I could be wrong. I am asking because I am currently drawing a background for a story I am writing and I would like to know if my background, which is an art scene, would violate the guidelines. I am drawing a person carrying an injured mermaid (I know it sounds weird, but the story involves mermaids). I want to know how much, if any, injuries I could draw on a person. I’m not going to be drawing someone with broken bones or major wounds or any other graphic things, but more things like a few scrapes and bruises. I don’t know how much, if any, blood I could show. The injuries would not be major. Where can I find the guidelines for backgrounds? And would showing someone with a few scrapes and bruises and maybe minimal bleeding/blood be against the guidelines? If it is, I would still draw the scene, I just wouldn’t include injuries. I just don’t want to spend a lot of time drawing something and it not being approved. Thanks!