regolith-look Satan
Satan theme for the Regolith desktop environment built from the Black Hole look.
You need the Ubuntu-Mono-Dark-Red Gnome theme for icons and a satanic background to put at /usr/share/backgrounds/regolith-satan.jpg. For PNGs or other formats, you can edit the background picture path in the root file.
I use the Firefox browser with some satanic theme and the Dark Background Light Text extension with these colors:
#ff0000
#000000
#FF8888
#dc8add
#a51d2d
#FF0000