This post was originally published on this siteIt checks the color contrast between the foreground and background of the elements that are in the page according to the WCAG 2. It evaluates the contrast on all elements of the page considering their computed style for the color and background-color CSS properties.
This post was originally published on this siteSeems like it probably worked well originally (i.e. in 2019), but now – at least for me – it’s a bit broken. You can activate the extension and then select a color from a page, but once you’re in ‘eyedropper’ mode, there’s no way to deactivate it.