To check the color contrast between foreground and background of the texts
Users
100K
0 in 30 days
Rating
3.9 / 5
unchanged in 30 days
Ratings
35
0 in 30 days
Store rank
#2,168
#1,915 among extensions
Version
3.8.5
updated 27 Dec 2025
Users
monthly, 3 years
Latest, 15 Oct 2026:100,000 usersMove the mouse over the chart for any month
Ratings count
monthly, 3 years
Latest, 15 Oct 2026:35 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About WCAG Color contrast checker
It checks the color contrast between the foreground and background of the elements that are in the page according to the WCAG 2.2.
It evaluates the contrast on all elements of the page considering their computed style for the color and background-color CSS properties. In case of these colors are defined with RGBA values, it also considers the opacity to deduce the real color that finally is show.
It can simulate color blindness and evaluate the contrast for the simulations. By this way, developers can see how the pages look for colorblind users.
The tool also includes two fields in which the colors can be introduced manually to be tested. It also allows to pick the color directly from the documents.
Finally, it auto-refreshes when DOM of the page changes (addition or removing elements), but if the page has many changes, this behavior can be de-activated.
Privacy statement on: https://rumoroso.bitbucket.io/
Growth
Window
Users
Change
Ratings
Rating
7 days
0
+0.0%
0
0.00
30 days
0
+0.0%
0
0.00
6 months
0
+0.0%
+1
−0.08
1 year
+10K
+11.1%
+4
−0.24
Chrome Web Store search rankings
Where WCAG Color contrast checker appears when people search the store, with the 30 day change