Board Thread:Wiki discussions and announcements/@comment-171752-20150806155555/@comment-171752-20150813173638

Emptylord: Regarding your latest request, this isn't exactly what you asked for, but maybe it's useful for what you're wanting to do.

As detailed at Help:PortableInfoboxes/CSS, you can use  on the opening infobox tag. Then when calling the template, you can pass, which can have specific styling applied to it (and its child classes) using the following:

.pi-theme-ability-Q { (styles) }