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 Last checked 27 Sep 2026, 06:26 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
Trader status
Declared a trader under EU law
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)

Open in the Chrome Web Store ↗ Download the CRX from Google ↗
Users over time As shown on the Chrome Web Store

Tracking began on 27 Sep 2026. The chart appears after the second check.

Show the numbers
CheckedUsersRatingRatings
2026-09-2740,0003.4240
Users, 7 days
–
needs a week of history
Users, 30 days
–
needs a month of history
Rank
#2,849
by users, of 264,254 extensions
In its category
#188
of 7,977 in Accessibility

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 Sep 2026.

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 27 Sep 2026, 06:26 UTC; next check around 3 Oct 2026.

We don't copy descriptions, screenshots or developers' contact details. How we collect the data

Cite this page

Extension Tracker. “Colour Contrast Checker” (nmmjeclfkgjdomacpcflgdkgpphpmnfe). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/nmmjeclfkgjdomacpcflgdkgpphpmnfe. Accessed 2026-09-27.
BibTeX
@misc{extensiontracker_nmmjeclfkgjdomacpcflgdkgpphpmnfe,
  title   = {Colour Contrast Checker (nmmjeclfkgjdomacpcflgdkgpphpmnfe)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/nmmjeclfkgjdomacpcflgdkgpphpmnfe},
  urldate = {2026-09-27}
}

The data is free to reuse under CC BY 4.0.