User blog comment:FastLizard4/New Skin and AJAX RC/@comment-140200-20100121233950

Template:Infobox Game is a good example of a template that would require multiple classes, one for each color used. It's hard to say exactly what templates are table-based and which aren't, but those definitely are. We don't actually need a root category like that, because Special:Prefixindex does that job pretty well. Actually, I don't know of any templates aside from, say, Template:W and Template:Wanon that aren't table based. As for whether or not the different colors is necessary, I personally think it looks rather nice. And the navigation templates sometimes have different color headers for effect or to separate them.