I was wondering if anyone knew any color schemes with a pure black background (#000000)? Every theme I could think of used something lighter colored so I wanted to know if I was missing some.
The motivation is partially I think it would look cool and partially the potential for lower power usage on an oled screen.
Edit: primarily asking for color scheme suggestions for my window manager and terminal, less so how to theme
You already know probably, but scheme artists avoid pure #000000 out of contrast concerns. (e.g. DarkReader can give some headaches if the background is straight black with offwhite text).
If you want it for yourself though, you should just tweak a preexisting dark theme and change navies/greys to black. And if you're talking about the palette instead of actual themes, this still works -- just check the source for whatever colors they're using. (grep for hexes then sort uniq? shell exercise is left to the reader)
I'd recommend taking one of vinceliuice's themes and just turning navy blues into blacks. For example, Graphite-gtk (has a matching qt theme) is pretty grey even with a black tweak, but you could blacken it with some effort. Same with Colloid-gtk (also has a black tweak).
You could probably even darken the KDE theme's greys if you fancied, but then you may need to tune down the contrast on the other colors used.
If this is too inexact an answer, then I wish you luck!
I love the KDE plasma theme Underworld. It's definitely black and pairs well with a ton of stuff. I like Breeze Dark as the global theme, Ball10050's Black color, and Underworld for the plasma style. This makes it all primarily black.
I ended up setting up custom themes for multiple different widget sets to get a true black background. It was easy for most QT variants, not too bad for GTK2, really awful for GTK3 because it doesn't have proper documentation for manual theme creation, and I haven't tried to tackle GTK4 yet.
Because they all need different configs (and the window manager title bar etc. may need yet another one), it's difficult to give suggestions unless you tell us which terminal and window manager software you're trying to theme—the requirements for a Gnome session are different from those for something like fluxbox. Some terminal software even has its own built-in theming support.