Midnight Lizard

Midnight Lizard color schemes work across all websites. There are many predefined color schemes and you can install more from midnight-lizard.org
  ✔ Choose between dark, light, grayscale or colorful color schemes
  ✔ Modify existing or create new color schemes
  ✔ Use different color schemes on each website
  ✔ Adjust brightness, saturation, contrast and hues
  ✔ Improve accessibility and readability
  ✔ Increase contrast to make text easier to read
  ✔ Apply blue light filter to shift all colors towards red light
  ✔ Keep original images and hues without inversion
  ✔ Schedule automatic activation and deactivation
  ✔ Use keyboard shortcuts to toggle extension
     ⮚ on current website: Alt+Shift+L
     ⮚ globally: Alt+Shift+M
  ✔ Use with PDF and local files (enable in browser settings)
  ✔ Shade bright colors and images
  ✔ Change any colour you want
  ✔ Synchronize your settings
  ✔ Configure background, text, buttons, links, borders, images and scrollbars
  ✔ Apply globally, per-website or with url match patterns
  ✔ Switch between websites blacklist and whitelist modes
  ✔ Use Simplified mode to improve performance on heavy websites
  ✔ Contribute to our open source project on GitHub.com/Midnight-Lizard
  ✔ Donate to our OpenCollective.com/Midnight-Lizard