Dark theme for new Facepunch forums found at https://forum.facepunch.com/f/
This style must be installed with a browser extension.
Chrome: Osprey
FireFox: StylRRR
You can install the style here:
https://userstyles.org/styles/150474/facepunch-awfully-dark-ii-for-new-facepunch
If you want a bleeding edge version of this theme that may not have been pushed to the userstyles page. Simply create a style in the chosen style extension for a website starting with URL https://forum.facepunch.com/f/, and paste the contents of the style.css in it.
This styles colors can be customized directly in the CSS. At the very top inside the :root section are next to all colors defined.