https://thenextweb.com/basics/2019/09/13/how-to-enable-dark-mode-in-slack-on-your-desktop/

Welcome to TNW Basics, a collection of tips, guides, and advice on how to easily get the most out of your gadgets, apps, and other stuff.

In March, Slack rolled out dark mode for its iOS and Android apps. Now, it’s rolling the feature out for its desktop apps: Windows, Mac, and Linux.