网页颜色对比：对Common Crawl顶级500个域名的WCAG 2.1级别AA合规性审计
Colour Contrast on the Web: A WCAG 2.1 Level AA Compliance Audit of Common Crawl's Top 500 Domains
AI总结：
研究通过分析Common Crawl顶级500个域名的颜色对比合规性，发现大量网站未能达到WCAG 2.1级别AA的对比度要求，揭示了网页可访问性中的普遍问题。
摘要：
我们对Common Crawl的CC-MAIN-2026-08二月2026次抓取档案中的500个最频繁抓取的注册域名进行了大规模自动化审计，检查WCAG 2.1/2.2级别AA的颜色对比合规性。不同于进行实时抓取，所有页面内容均来自Common Crawl的开放WARC档案，确保了可重复性和避免了对目标网页服务器造成负担。我们对240个首页的静态CSS分析确定了4,327种独特的前景/背景颜色配对，其中1,771种（40.9%）未能达到4.5:1的对比度阈值以满足正常文本的要求。每个网站的中位通过率是62.7%，20.4%的网站在所有检测到的颜色配对上实现了完全合规。这些发现表明，颜色对比仍然是最 prominent 网站上广泛存在的可访问性障碍，不同域名类别之间存在显著差异。
英文摘要：
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 sourced from Common Crawl's open WARC archives, ensuring reproducibility and eliminating any load on target web servers. Our static CSS analysis of 240 homepages identified 4,327 unique foreground/background colour pairings, of which 1,771 (40.9%) failed to meet the 4.5:1 contrast ratio threshold for normal text. The median per-site pass rate was 62.7%, with 20.4% of sites achieving full compliance across all detected colour pairings. These findings suggest that colour contrast remains a widespread accessibility barrier on the most prominent websites, with significant variation across domain categories.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
