Read through other sources

[chelmertz]

• https://arslan.io/2021/02/15/automatic-dark-mode-for-terminal-applications/
• https://gitlab.com/EvanHahn/dotfiles/-/blob/ece393e625bb8254fe05774df33bb5af8a73d7e7/home/bin/bin/theme

[chelmertz]

https://github.com/GNOME/gsettings-desktop-schemas/blob/97a64af9729b5b3567d7d1fa8887b7a3a4d4a15f/schemas/org.gnome.desktop.interface.gschema.xml.in#L298-L304

gsettings set org.gnome.desktop.interface color-scheme 'prefer-dark'
gsettings set org.gnome.desktop.interface color-scheme 'prefer-light'
gsettings set org.gnome.desktop.interface color-scheme 'default'

gsettings get org.gnome.desktop.interface color-scheme

works wonders, testing with a firefox theme that is supposed to be system-settings aware.

[chelmertz]

Done, with https://iamnearlythere.com/dark-mode-ubuntu-i3/