https://meta.discourse.org/t/how-do-i-install-a-theme-or-theme-component/63682
Basically pretty easy and straight forward:
- Go to Admin
- Customize
- Themes
- Import
- From the web > github repro URL: https://github.com/hackdefendr/your-mom-discourse-dark-theme
- Adjust as you wish. A Color Scheme is inclusive
Included is a theme switcher at the top Discourse Header where people can choose between a Light (default) Theme and this Dark theme. I set a global modifier class in the html and store it in the local Storage. This way it is permanent and can react properly.
There is no support as I stole this theme for myself. I expect others to do the same :)