LegacyCollector

Home | Legacy Firefox Extensions | Content Policy | Contact

WCAG Contrast checker

Author(s):



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.

The tool also includes two fields in which the colors can be introduced manually to be tested.

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.

Download files:

wcag-contrast-checker-1.1.01.xpi
wcag-contrast-checker-1.1.02.1-signed.1-signed.xpi
wcag-contrast-checker-1.1.xpi
wcag-contrast-checker-1.2.1-signed.1-signed.xpi
wcag-contrast-checker-1.3.1-signed.1-signed.xpi
wcag-contrast-checker-1.4.1.1-signed.1-signed.xpi
wcag-contrast-checker-1.4.2.1-signed.1-signed.xpi
wcag-contrast-checker-1.4.3.1-signed.1-signed.xpi
wcag-contrast-checker-1.4.4.1-signed.1-signed.xpi
wcag-contrast-checker-1.4.5.1-signed.1-signed.xpi
wcag-contrast-checker-1.5.1-signed.1-signed.xpi
wcag-contrast-checker-1.5.1.1-signed.1-signed.xpi




This page is part of the LegacyCollector website.
Disclaimer: All material on this site is property of their respective owners and available under
open licenses to the best of our knowledge. If you are an author and would like anything removed,
then please write an e-mail to legacy [at] collector dot org.