Kontrast - WCAG Contrast Checker
Extension Delisted
This extension is no longer available in the official store. Delisted on 2025-09-17.
Quickly check and adjust contrast in realtime in your browser to meet WCAG 2.1 requirements.
Kontrast is a browser extension that let you quickly check and adjust text and background contrast in realtime in your browser to meet the standards of Web Content Accessibility Guidelines (WCAG) requirements.
Features:
✔ Auto inspect contrast for the selected element
✔ Display accessibility ratio
✔ Automatically get closest WCAG compliant color
✔ Color Slider
✔ RGB and HSL mode
✔ Color picker
✔ Easily copy color (HEX, RGBA, HSLA)
✔ Ignore CSS hover effect
✔ Dark Mode
Special thanks to Gary Simon from Coursetro.com for covering my product.
Latest reviews
I thought it will catch all the erros by itself, but it didn't, I have to manullly check each text
Use it to quickly tell what colors work where. 10/10.
still don't work :(
The font size and weight show but are not editable. And there is no way to reset the element. This is definitely useful, and I would like it improved to give it 5 stars. I give it 3.5 stars
i brought this 2 dayes ago... but the validate button doesn't work.. can't activate the program.. and the dev doesn't response to the email.. this is the most worst type of services i have every seen in my entier life.. it is even worse then my 2 dollar companny.. :3
Poor! Almost none of the features described in the overview are available with this extension.
Doesnt work at all on Chrome. When I click on the K icon nothing happens. Weird & deceiving. Was expecting something good about it.
Almost none of the features described in the overview are available with this extension. They have to outline free VS paid otherwise this is just a list of 'things' you don't get with this plugin.
Its not working :(
Was hoping for a tool that would automate contrast checking. This one doesn't do that, but that's not the reason for the low score. When I tried to use the color picker to manually check contrast using this extension, the color picked and the zoom view of the color picker did not correspond to the position of my cursor on the screen. The color depicted in the zoom and the color selected upon click was not the same as the color I was currently hovering over. This seems to work well if you enter hex codes, but I may as well do that on a contrast checker web site. The extension doesn't make the process any easier.
Just what I needed! A quality tool for any auditor to quickly pull hex codes when testing websites for accessibility. Bravo!
Amazing extension. Exactly what I wanted! Dev teams reaction is amazing!!! Issue solved in no time! WOW. Thank you guys. Keep up the good work!
Great extension, does exactly what it says. Also the dev teams' response is almost instant and they immediately started on resolving my query. I'm recommending this extension to our entire office.
👍👍👍👍👍
