Board Thread:Support Requests - Getting Started/@comment-33927782-20200404173639/@comment-23989026-20200404180634

That example is using a portable infobox. It is using MediaWiki:Themes.css

infobox

MediaWiki:Themes.css /** Season 1 theme **/ .pi-theme-season1 { border-bottom: 8px solid #554c99; } .pi-theme-season1 .pi-image, .pi-theme-season1 .pi-title, .pi-theme-season1 .pi-header { background-color: #554c99; color: #ffffff; }

To use this method needs Admin rights of the wiki and non-UCP wiki

Alternative methods are available