Forum:Any way to customize each tab within tabber?

I'm making the main page of ko.oreimo wiki look prettier and I'm looking into customization of the tabber. More specifically, I want to give different colors to each tab in control panel, but they are just missing css propertie. How can I get them colored?

If possible, I wanna do it purely with CSS, because Javascript hack is sometimes fragile: I lost thier effect and so on. If somebody can suggest me any CSS trick I'll prefer it.