Quick Reference Spice or Violence Tags

I know there are content warnings and tags that can tell the reader that the book has different forms of violence, nudity, etc. But I was thinking that if we could also have something to indicate spice levels and violence/gore levels at a quick glance. So, like the chili pepper icon that ranges from 1-5 based on how spicey the romance is going to get, and maybe a knife or blood drop (I don’t really know what would be best on this one lol) that also has a 1-5 range to indicate just how graphic the violence can get in the story. Just something that can appear by the title so the reader will know at a quick glance that this has what they want or it might be a bit much for them lol.