Noodle respects requests for dark mode with the "prefers-color-scheme:dark" CSS that can be customized.

Web Browsers respect requests for dark mode by the Operating System, and can be customized:

• Firefox:
  • about:config > ui.systemUsesDarkTheme=1
• Firefox(Android):
  • Settings > Customize > Dark
• Chrome(Desktop):
  • chrome://flags > "Force Dark Mode for Web Contents"
  • Note that as of v85 Chrome "prefers-color-scheme" is not supported, instead chrome will attempt to write it's own CSS for the page, often causing breakage (still true @ v105).
  • use chrome --force-dark-mode --enable-features=WebUIDarkMode to fix bug on Linux.

• Chrome(Android):
  • Settings > Themes > Dark

Operating Systems can be customized to use dark mode:

• Windows:
  • Settings > Personalization > Colors > Choose your color > Dark
• MacOS:
  • Apple > System Preferences, General, Appearance > Dark
• Gnome/KDE(Linux):
  • Settings > Appearance > Dark
  • Tweaks > Appearance > Legacy > Dark
• Android(Linux):
  • Settings > Display > Dark theme
• iOS:
  • Settings > Display & Brightness > Dark

Other sites that support dark mode as of 2020:

• youtube
• twitter
• docs.microsoft
• duckduckgo

Other sites that support dark mode as of 2025:

• calendar.google.com
• facebook.com
• google.com
• instagram.com
• reddit.com
• wikipedia.org (beta setting)