![](https://addons.mozilla.org/user-media/addon_icons/998/998252-64.png?modified=337d9493)
A11Y - Color blindness empathy test
Empathy test for color blindness and visual impairment. This add-on emulates 8 types of color blindness, plus grayscale to check the contrast of your website.
https://vinceumo.github.io/A11Y-Color-Blindness-Empathy-Test/
![](https://addons.mozilla.org/user-media/previews/thumbs/208/208170.jpg?modified=1622133493)
What is A11Y - Color blindness empathy test?
A11Y - Color Blindness Empathy Test is a Firefox add-on that allows you to test and simulate color blindness. It provides 8 types of color blindness and grayscale options to check the contrast of your website.
Add-on stats
By: Vincent Humeau
Rating: 4.17
(6)
Creation date: 2018-09-13
Weekly download count: 2
Firefox on Android: No
Risk impact: Very low risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
Permissions:
- activeTab
Size: 18.62K
URLs: Website
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User reviews
Loved using this to ensure my products were colorblind accessible. Includes a lot more colorblind options than other tests I've used. Other tests don't include vision loss either. Worked great for a long time but more recently has been lagging or just not working at all. Think it's been a number of years since it's been updated. A new update is needed please!
by glo24, 2024-07-09
It works well with the vision loss and grayscale options, but the rest of the options absolutely do not work (e.g. I still see the color red when selecting "Protanopia"). I'm using the latest version of Firefox (126.0). I have script blockers installed (uBlock origin and NoScript), maybe the problem comes from that, but it would be surprising as the vision loss and grayscale options work perfectly well.
by rebbj, 2024-05-17
Work and easy to use. Congrats!
by Édouard Lopez, 2023-03-14
Add-on safety
Risk impact
A11Y - Color blindness empathy test is safe to use. It does not request any sensitive permissions.
Risk likelihood
A11Y - Color blindness empathy test is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
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