Published pages could inherit categories' background image setting

[Canapin (Coin-coin le Canapin)]

Pretty much all is in the title. If it’s not possible, is it possible to store categories’ background images in CSS variables that we could use in our own custom CSS? It would be more convenient than using the full image URL.

See:

Adding a category class to a Published Page

If we can’t use type="text/discourse-plugin" in a script tag, is there a way to get the current category slug of a published page? The purpose is to add a new class containing the slug in a page HTML tag.

And the following messages.