I've been meaning to make these, so I finally did. Hope you guys enjoy!
https://open.substack.com/pub/drsmartguy/p/load-management-for-my-eyes
Nice... very cool. Thanks for sharing.
To be clear though, there are a couple of dark preview themes included in the default install:
- Blackout
- GitHub Dark
Might be a good idea to create a shared GitHub repo that includes a few additional themes...
I have a Blue Lagoon custom theme I use that's use similar background:

Also noticed you're using CSS variables which would be good to update all the themes with at some point - the original themes pre-date support for those.
+++ Rick ---
Thanks! That blue theme looks nice! Can I try that one?
I added a Themes folder to the Markdown Monster Repo:
Maybe add your Dracula Theme here as well?
+++ Rick ---
Sure...how do I add it?
I like that blue theme, I got inspired and created something like it also. I don't think I should share it as it uses a custom font Questa, which I like to use for print because it has cool ligatures for certain letters. But check it out.

What's the header font you're using in this?
Re: Sharing
If you want to share a theme - as long as it's self contained (ie. fonts if public can be shared in the theme folder) - you can create a Pull Request for the Markdown Monster repo and just add your custom theme at the same level as the Blue Lagoon theme.
+++ Rick ---
The header font is Questa Slab, part of the same font family. The body text is Questa Sans.