Obsidian Dark theme for Chrome Developer Tools
Copy Custom.css into:
~/Library/Application Support/Google/Chrome/Default/User StyleSheets/Custom.css
%USERPROFILE%\AppData\Local\Google\Chrome\User Data\Default\User StyleSheets\Custom.css
~/.config/chromium/Default/User StyleSheets/Custom.css
npm install stylus -g
stylus < Custom.styl > path/to/Custom.css