Umbra — Dark Mode for Every Website

Automatic dark mode & night mode for any website. A designer-quality dark theme that's easy on the eyes — private, no sign-in.

Umbra is dark mode for every website. It makes pages easier on the eyes at night and in low light — without simply inverting everything to harsh pure black. ✨ How Umbra works Softer colors — Not pure black / white, so the screen feels gentler. Prefer the site’s own dark — When “Detect dark theme” is on (default), Umbra skips sites that already look dark. Dark from the first paint — An early fallback darkens the page right away, so you see less white flash while the full theme loads. Your controls — Turn dark mode on for all sites or just one. Adjust brightness, contrast, and grayscale in the popup. 🚀 Features Global or per-site toggle Optional automation (time of day, system theme, or location) Keyboard shortcuts (e.g. Alt+Shift+D) Settings saved on your device (optional Chrome Sync)