WCAG Color contrast checker icon

WCAG Color contrast checker

by Jorge Rumoroso · Developer Tools
FeaturedManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

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
10K55K100KAug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 100,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
52035Aug 2023Apr 2025Oct 2026
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

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00
6 months0+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
Search phrasePosition30 days
color#7+18
checker#10+17
change color#30+12
plugin#93new

Version history

13 versions recorded
3.8.527 Dec 2025
3.8.43 Mar 2024
3.8.32 Mar 2024
3.8.226 Feb 2024
3.7.22 Apr 2023
3.7.129 Mar 2023
3.7.021 Mar 2023
3.6.227 Feb 2023

Details

Category
Developer Tools
First seen
26 Jun 2020
Size
158 KB
Languages
en
Pricing
Free
Extension ID
plnahcmalebffmaghcpcmpaciebdhgdf

Permissions and risk

Minimal riskimpact 3, likelihood 0
Permissions
activeTabstoragewebNavigation
Site access
<all_urls>
Can read and change data on every website you visit.

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