Color Blind FilterFree · No account · Nothing leaves your browser
Color blind filter for every website
Charts where red and green look the same, maps you can’t read, status dots you have to guess. Color Blind Filter shifts the colors you can’t tell apart into ones you can, on every site you open in Chrome.
Try it here
Try it right on this page
This is the same code the extension runs. Nothing is uploaded.
Sales: red = loss, green = profit
Status
Before
Red “loss” and green “profit” bars look the same brownish shade; online and offline dots are a guess.
After
The same chart with the filter: the red bars turn clearly different from the green ones, and the legend is readable again.
Why people use it
Color blind filter for every website
Works everywhere
One setting for all sites: Google Sheets, maps, games, shops, dashboards.
Your type of color blindness
Deuteranopia, protanopia or tritanopia, plus grayscale.
For designers too
Simulate how your page looks to color blind users before you ship it.
How it works
Three steps, no account
Install Color Blind Filter.
Click its icon and pick your type: red-green or blue-yellow.
Browse as usual: every tab uses the filter until you switch it off (Alt+Shift+C).
Red and green that look different again. On every site, with one click.
FAQ
FAQ
Which type of color blindness does it help?
Red-green (deuteranopia and protanopia, about 8 in 100 men) and blue-yellow (tritanopia). Pick your type once; it stays on for every site.
Does it work on every website?
Yes, on every page you open in Chrome: charts, maps, games, shops, Google Sheets, dashboards. Chrome's own pages (settings, the Web Store) can't be changed by any extension.
How is the correction done?
It shifts the colors you can't tell apart into ones you can (daltonization), based on the Machado 2009 model used in color science.
Can designers use it to check accessibility?
Yes. The simulate modes show the page as people with deuteranopia, protanopia, tritanopia or full color blindness see it.
Is it free? Does it collect data?
Free, with no account and no limits. It has no server: nothing about the pages you visit is sent anywhere.
How do I turn it off quickly?
Press Alt+Shift+C to switch the filter off and back on, or choose Off in the menu.
Ready when your next page is
Install in a few seconds. Works offline, no sign-up.