Chrome & Edge · free · no tracking

CORRECT COLORS
ON EVERY SITE

A browser extension that re-colors any web page in real time so you can tell colors apart — maps, charts, dashboards, red warning text. Pick your type of color blindness once and it follows you across the whole web.

Add to Chrome Add to Edge Try the camera version

In review on the stores now. Want it today? The camera version runs in your browser with nothing to install, and developers can load the extension unpacked from GitHub.

HOW IT WORKS

Click the toolbar eye and choose a mode. The page's colors are re-mapped so the differences your vision normally compresses become visible again (daltonization, via an in-browser color filter). Your choice is remembered as you browse.

Recommendedhelps all types — pick this if you don't know yours
Deuteranopiagreen-weak, the most common
Protanopiared-weak
Tritanopiablue-yellow
Offnormal colors

It corrects, it doesn't simulate — the point is to help you see, not to show sighted people what color blindness looks like. It runs on the same published method as the rest of OpticQuiz: Machado (2009) simulation, scored with CIEDE2000.

PRIVATE BY DESIGN

No tracking. No network requests. No account. Everything happens in your browser; your chosen mode is stored only on your device. See the full privacy policy.

Honest scope. Correction is a powerful aid, not a cure — it strongly improves color separation but won't resolve every case. Because it applies one filter to the page, sites that rely on position:fixed/sticky elements may shift while a mode is on; switch to Off to restore. Method: published, open-access.