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It is best to choose background colors that offer sufficient contrast in relation to text and blue links, which is also the color of references, both of which are very common in most articles. Use the WCAG link contrast checker to ensure that the chosen background color offers the recommended WCAG AA level of contrast against normal text ...
WCAG 2.0 uses the same three levels of conformance (A, AA, AAA) as WCAG 1.0, but has redefined them. The WCAG working group maintains an extensive list of web accessibility techniques and common failure cases for WCAG 2.0. [24] WCAG 2.1 is backwards-compatible with WCAG 2.0, which it extends with a further 17 success criteria.
You can use a few online tools to check color contrasts, including: the WebAIM online contrast checker, or the WhoCanUse site, or Snook's Color Contrast Check. Several other tools exist on the web, but check if they are up-to-date before using them. Several tools are based on WCAG 1.0's algorithm, while the reference is now WCAG 2.0's algorithm.
The Web Content Accessibility Guidelines 1.0 (known as WCAG) were published as a W3C Recommendation on 5 May 1999. A supporting document, Techniques for Web Content Accessibility Guidelines 1.0 [35] was published as a W3C Note on 6 November 2000. WCAG 1.0 is a set of guidelines for making web content more accessible to persons with disabilities.
Download QR code; Print/export Download as PDF; ... Contrast ratio WCAG 2.0 ... Colour Contrast Check; G18: Ensuring that a contrast ratio of at least 4.5:1 exists ...
Previous versions of EN 301 549 embraced WCAG 2.0 as an ‘electronic attachment’. The next version of EN 301 549 (v4.1.1) will be released in 2026. [11] This new version is planned to support the European Accessibility Act and to include WCAG 2.2 AA, as well as significant updates to requirements related to Real-Time Text. [12]
In articles such as "WCAG 2.0: The new W3C guidelines evaluated", [9] "To Hell with WCAG 2.0" [10] and "Testability Costs Too Much", [11] the WAI has been criticised for allowing WCAG 1.0 to get increasingly out of step with today's technologies and techniques for creating and consuming web content, for the slow pace of development of WCAG 2.0 ...
For accessibility, WCAG 2.0 AA guidelines require a contrast ratio of 3 or larger for large text, and 4.5 or larger for normal sized text. In the default mode, color2 and color3 are white and black, and the selected color pair will always have a contrast ratio greater than 4.58.