Ext Ops Panel
Open dashboard

Color Contrast Checker

Chrome extension by Gutwerker · Productivity · Developer

  • Established publisher
  • Trader

A Chrome extension in Productivity · Developer with 445 users, barely installed. Audience over the last 30 days: +11.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 3 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
445
Rating
5.0 (3 ratings)
Users, last 30 days
+11
Rating, last 30 days
Steady over 30 days
Version
1.2
Updated in the store
2024-11-21
Published
2024-07-18
Manifest
V3
Browser access
No permissions declared

How it has moved

Users
+11 since 14.10
430-453 · 20 readings
  1. 2026-10-16433
  2. 2026-10-17435
  3. 2026-10-18432
  4. 2026-10-19436
  5. 2026-10-20441
  6. 2026-10-21447
  7. 2026-10-22448
  8. 2026-10-23447
  9. 2026-10-24444
  10. 2026-10-25430
  11. 2026-10-28441
  12. 2026-10-29444
  13. 2026-10-30448
  14. 2026-11-01436
  15. 2026-11-04453
  16. 2026-11-06450
  17. 2026-11-07444
  18. 2026-11-08442
  19. 2026-11-11445
  20. 2026-11-13445
Rating
unchanged since 14.10
reviewsrating 5.00 · 20 readings
  1. 2026-10-16reviews3rating5.00
  2. 2026-10-17reviews3rating5.00
  3. 2026-10-18reviews3rating5.00
  4. 2026-10-19reviews3rating5.00
  5. 2026-10-20reviews3rating5.00
  6. 2026-10-21reviews3rating5.00
  7. 2026-10-22reviews3rating5.00
  8. 2026-10-23reviews3rating5.00
  9. 2026-10-24reviews3rating5.00
  10. 2026-10-25reviews3rating5.00
  11. 2026-10-28reviews3rating5.00
  12. 2026-10-29reviews3rating5.00
  13. 2026-10-30reviews3rating5.00
  14. 2026-11-01reviews3rating5.00
  15. 2026-11-04reviews3rating5.00
  16. 2026-11-06reviews3rating5.00
  17. 2026-11-07reviews3rating5.00
  18. 2026-11-08reviews3rating5.00
  19. 2026-11-11reviews3rating5.00
  20. 2026-11-13reviews3rating5.00
Users
+13 since 31.08
419-453 · 39 readings
  1. 2026-08-31432
  2. 2026-09-02433
  3. 2026-09-04438
  4. 2026-09-06432
  5. 2026-09-07435
  6. 2026-09-09436
  7. 2026-09-13419
  8. 2026-09-15434
  9. 2026-09-16441
  10. 2026-09-20436
  11. 2026-09-21438
  12. 2026-09-25445
  13. 2026-09-26441
  14. 2026-09-28443
  15. 2026-10-04426
  16. 2026-10-08435
  17. 2026-10-09429
  18. 2026-10-10421
  19. 2026-10-13434
  20. 2026-10-16433
  21. 2026-10-17435
  22. 2026-10-18432
  23. 2026-10-19436
  24. 2026-10-20441
  25. 2026-10-21447
  26. 2026-10-22448
  27. 2026-10-23447
  28. 2026-10-24444
  29. 2026-10-25430
  30. 2026-10-28441
  31. 2026-10-29444
  32. 2026-10-30448
  33. 2026-11-01436
  34. 2026-11-04453
  35. 2026-11-06450
  36. 2026-11-07444
  37. 2026-11-08442
  38. 2026-11-11445
  39. 2026-11-13445
Rating
unchanged since 31.08
reviewsrating 5.00 · 39 readings
  1. 2026-08-31reviews3rating5.00
  2. 2026-09-02reviews3rating5.00
  3. 2026-09-04reviews3rating5.00
  4. 2026-09-06reviews3rating5.00
  5. 2026-09-07reviews3rating5.00
  6. 2026-09-09reviews3rating5.00
  7. 2026-09-13reviews3rating5.00
  8. 2026-09-15reviews3rating5.00
  9. 2026-09-16reviews3rating5.00
  10. 2026-09-20reviews3rating5.00
  11. 2026-09-21reviews3rating5.00
  12. 2026-09-25reviews3rating5.00
  13. 2026-09-26reviews3rating5.00
  14. 2026-09-28reviews3rating5.00
  15. 2026-10-04reviews3rating5.00
  16. 2026-10-08reviews3rating5.00
  17. 2026-10-09reviews3rating5.00
  18. 2026-10-10reviews3rating5.00
  19. 2026-10-13reviews3rating5.00
  20. 2026-10-16reviews3rating5.00
  21. 2026-10-17reviews3rating5.00
  22. 2026-10-18reviews3rating5.00
  23. 2026-10-19reviews3rating5.00
  24. 2026-10-20reviews3rating5.00
  25. 2026-10-21reviews3rating5.00
  26. 2026-10-22reviews3rating5.00
  27. 2026-10-23reviews3rating5.00
  28. 2026-10-24reviews3rating5.00
  29. 2026-10-25reviews3rating5.00
  30. 2026-10-28reviews3rating5.00
  31. 2026-10-29reviews3rating5.00
  32. 2026-10-30reviews3rating5.00
  33. 2026-11-01reviews3rating5.00
  34. 2026-11-04reviews3rating5.00
  35. 2026-11-06reviews3rating5.00
  36. 2026-11-07reviews3rating5.00
  37. 2026-11-08reviews3rating5.00
  38. 2026-11-11reviews3rating5.00
  39. 2026-11-13reviews3rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

We have not read this listing's manifest since we started keeping permission names. The counts above come from the last time we did.

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

Gutwerker. Listed website: barrierefrei-geprueft.de.

Like this one

Listings the catalog judges closest in what they say they do.

  1. Colour Contrast Checker Describes nearly the same job, with an established audience 40k users ★ 3.4
  2. Contrast Checker Describes nearly the same job, smaller audience 13 users
  3. Contrast Check – WCAG Color Tester Describes nearly the same job, smaller audience 3 users (last published figure)
  4. Elly's Contrast Checker Describes nearly the same job, smaller audience 6 users
  5. Contrast Check Describes nearly the same job, smaller audience 3 users (last published figure)

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Want this mark on your extension in our catalog?

Verify that you are its author and you can show this mark on the card, with live banners for your site and README. How verification works

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

Connect it in a minute See what the panel does
Add a badge to your README or site

The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/iamhldjgegihoihfdhcmmnihofajgjhp/badge.svg)](https://extops.dev/extensions/iamhldjgegihoihfdhcmmnihofajgjhp)

HTML

<a href="https://extops.dev/extensions/iamhldjgegihoihfdhcmmnihofajgjhp"><img src="https://extops.dev/extensions/iamhldjgegihoihfdhcmmnihofajgjhp/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-11. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built