Install:
cd path/to/your/sublime/packages
git clone https://github.com/rsms/sublime-theme.git rsms-theme
You'll also need the fonts Inter and JetBrains Mono installed on your system, which are used by the UI theme.
Open the command prompt in Sublime (⇧⌘P), type "rsms:" and select an option.
lights off
— enable dark themelights on
— enable bright themeselect theme...
— quickly preview the themestoggle dark/light
— toggle. Shortcut: ⌥⌘L