It is a tool for checking foreground and background color combinations of all DOM elements and determining if they provide sufficient contrast when viewed by someone having color deficits.
All the tests are based on the algorithms suggested by the World Wide Web Consortium (W3C).
W3Clove is a free to use web service which crawls any given website to generate the sitemap of it (or accepts sitemaps directly) and validates each URL through the W3C's validator.
