- set
export SLACK_DEVELOPER_MENU="true"
open -a "slack"
view -> developer -> toggle developer tools
- Paste the below code into the console and run it.
var cobaltUrl = 'https://gist.githubusercontent.com/pdsullivan/32bad68541ccb66ae6d4948f7c9e88bb/raw/f22e0f5de5ff25d2c06337e8a0ea1ce25885b0e4/cobalt.css';
$.get(cobaltUrl).then(function(css) {
$('').text(css).appendTo('body')