DarkScrollingGlobalNav

DarkScrollingGlobalNav inverses the global navigation bar's colour (making it dark) while scrolling the page and causes the bar to be always shown, similar to the old global navigation bar's behaviour.

Usage
Add the following line to your global.css page (for personal use on all wikis). It must be at the very top of the page (with any other @import rules you may have) to work.

You can also copy the contents of the MediaWiki:DarkScrollingGlobalNav.css page to your CSS page, if you prefer.