MediaWiki:Themes.css

/* The Light */ .portable-infobox.pi-theme-The-Light .pi-title, .portable-infobox.pi-theme-The-Light .pi-header, .pi-theme-tab.pi-theme-The-Light .pi-header.activetab, .page-The-Light .pi-theme-tab .pi-header.activetab{ background-color:#2F77B6; }