Enable Dark Mode Google Chrome on Windows 10

Follow below Steps...
  1. Open Settings in Windows 10.
  2. Click on Personalization.
  3. Click on Colors.
  4. Under the “More options” section, select the Dark option. 
Enjoy Dark Mode Windows 10 with Google Chrome Browser

Enable Dark Mode Google Chrome For All Website

  1. Open Chrome browser 
  2. Type chrome://flags in the search bar.
  3. Search Force Dark Mode for Web Contents then Enable the option.
Enjoy Dark Mode Google Chrome Browser for all website

Enable Dark Mode Google Chrome on YouTube

  1. Click the Account icon top right side on YouTube.
  2. Enable Dark Theme on
Enjoy Dark Mode on YouTube