Changes theme on slack (including message areas which usually remain headachy white) by inserting custom css to ssb-interop.js file.
Inspired by: https://github.com/widget-/slack-black-theme and answers on: https://github.com/widget-/slack-black-theme/issues/48.
npm install -g slacktheme
Resets to defaults: sudo slacktheme
Sets new theme: sudo slacktheme --theme one_dark
- One dark