This is a modern Dark-/Night-Mode Design based on the new Invision Community 4.6 (and above) Theme. Lightweight, pure CSS, no additional graphics were used.
You can see a LIVE DEMO on our site at InvisionFocus.de (select Bravo 6 in the footer). It is tested with Forums, Pages and Downloads.
It's well maintained because we use it on our own website. If you find any possible bugs, we'll fix them immediately.
It's free and comes without any brandings or visible copyrights.