Board Thread:Support Requests - Designing Your Wiki/@comment-36009152-20190523212557/@comment-9605025-20190524221631

I don't know where each is being used, but I would guess in the page content rather than infoboxes. There is separate CSS specifically for portable infoboxes.

The best solution depends on what exactly you will be doing with it. On their wiki, the choose colors based on affiliation. As such, they have multiple pages that use the same color scheme and the choice is based on an objective criteria. As such, it makes sense to use CSS and classes. If you are going to have a separate color scheme for each and every page you use it on, then the "non-CSS" solution makes more sense; assuming you want to use this solution.

However, this solution has a drawback. These "headers" aren't actual headers. In other words, they will not get added to the table of contents and you will not be able to link directly to their sections. If you wish to be able to do this, you will have to use actual headers together with page-specific CSS.