Thread:Project:Support desk/Controlling how a page's Categories appear on the page/reply (6)

Depends on the infobox. :-) Maybe it uses some default styles, which are provided by MediaWiki. If it's created with some template, then it's also possible that inside the template some classes are set. Also could it be possible that the exact colors are directly hardcoded inside the template (like style="color: white;"). You will be able to find out using a tool like e.g. Firebug or similar.