Board Thread:Support Requests - Designing Your Wiki/@comment-35289850-20200816222857/@comment-9605025-20200816223825

No. As I mentioned in this thread, the MediaWiki parser strips certain things out of the inline CSS. The use of an image URL is one of those things. - Edit:

Actually, it is a bit more dramatic than that. If the inline CSS for an element contains forbidden content, then all of the inline CSS for that element is stripped.