Thread:Extension talk:MobileFrontend/Skinning Header & Footer/reply

So there are some a lovely variables called $wgResourceLoaderLESSVars and $wgResourceLoaderLESSImportPaths.... If you swap out the MobileFrontend minerva.less file you can substitute this for anything you want and gain a huge amount of control about how you tweak your style. If there is something you want to style submit a patch turning it into a variable.

If you can code and are willing to write a patch for this this would be super useful :)