About this extension

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.

Rate your experience

Report this add-on for abuse

If you think this add-on violates Mozilla's add-on policies or has security or privacy issues, please report these issues to Mozilla using this form.

Please don't use this form to report bugs or request add-on features; this report will be sent to Mozilla and not to the add-on developer.

Used by

Report this add-on for abuse