28 September 2018 Update:
- Resolved many cosmetic issues, download latest zip file from below
Download and INSTALL this font family https://www.fontsquirrel.com/fonts/lato
Go to Application and right click on Slack > Show Package Content Contents > Resources > app.asar.unpacked > src > static > ssb-interop.js
Replace your CURRENT ssb-interop.js File
https://foxshift.com/slack-lato-font/ssb-interop.js.zip OR View file on GitHub
Restart Slack & ENJOY !!! ๐๐ป
Updating Slack will not cause this theme to reset! ๐ฆ
PS this is my own customization of original theme