Extension Tracker

Colour Contrast Checker

40,000 users Rated 3.42 from 40 ratings Last updated 12 Sep 2026

By Alex Clapperton Live in the Chrome Web Store nmmjeclfkgjdomacpcflgdkgpphpmnfe Search Google ↗ Last checked 6 Nov 2026, 22:22 UTC

The listing

What the Chrome Web Store shows, as of the last check

Check the contrast between different colour combinations against WCAG standardsSummary from the listing
Developer
Alex Clapperton
Enhanced Safe Browsing
Trusted. What this means →
Category
Make Chrome Yours › Accessibility
First published
22 May 2019
Last updated
12 Sep 2026
Version
2.1.0
Size
159 KiB
Minimum Chrome
88
Languages
1 language

English (United Kingdom)

Website
https://colourcontrast.cc/
Support page
https://github.com/Pushedskydiver/CC-Checker-Chrome-Extension/issues
See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
40KTracking began 27 Sep 202627 Sep4 Oct11 Oct18 Oct25 Oct1 Nov2026-09-27: 40,000 users2026-10-03: 40,000 users2026-10-09: 40,000 users2026-10-16: 40,000 users2026-10-23: 40,000 users2026-10-30: 40,000 users2026-11-06: 40,000 users40,00040KTracking began27 Sep11 Oct25 Oct2026-09-27: 40,000 users2026-10-03: 40,000 users2026-10-09: 40,000 users2026-10-16: 40,000 users2026-10-23: 40,000 users2026-10-30: 40,000 users2026-11-06: 40,000 users40K
Average rating
3.403.5027 Sep11 Oct25 Oct3.423.403.5027 Sep11 Oct25 Oct3.42
Number of ratings
4027 Sep11 Oct25 Oct404027 Sep11 Oct25 Oct40
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-0640,0003.4240
2026-10-3040,0003.4240
2026-10-2340,0003.4240
2026-10-1640,0003.4240
2026-10-0940,0003.4240
2026-10-0340,0003.4240
2026-09-2740,0003.4240
Users, 7 days
No change
since a week ago
Users, 30 days
No change
+0.0%
Rank
#2,796
by users, of 292,125 extensions
In its category
#183
of 8,374 in Accessibility

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 Sep 2026.

Developer history

Moves to another publisher account and new contact emails, newest first

No move to another account and no new contact email since tracking began on 27 Sep 2026.

We know contact emails only by a keyed hash, so they're never shown. Recent account and contact changes →

What it can access

From the extension's manifest, in plain language

Every websiteIt can read and change your data on all the sites you visit.
Sites where it runs scripts
  • <all_urls>Every website
Browser features
  • activeTabThe tab you're on, only after you click the extension

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 6 Nov 2026, 22:22 UTC; next check around 14 Nov 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “Colour Contrast Checker” (nmmjeclfkgjdomacpcflgdkgpphpmnfe). Chrome Web Store data, last checked 2026-11-06. https://extensiontracker.com/extension/nmmjeclfkgjdomacpcflgdkgpphpmnfe. Accessed 2026-11-13.
BibTeX
@misc{extensiontracker_nmmjeclfkgjdomacpcflgdkgpphpmnfe,
  title   = {Colour Contrast Checker (nmmjeclfkgjdomacpcflgdkgpphpmnfe)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-06},
  url     = {https://extensiontracker.com/extension/nmmjeclfkgjdomacpcflgdkgpphpmnfe},
  urldate = {2026-11-13}
}

The data is free to reuse under CC BY 4.0.

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