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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.
Use the WCAG link contrast checker to ensure that the chosen background color offers the recommended WCAG AA level of contrast against normal text (#202122) and blue links (#3366CC for the default Vector 2022 skin). [1] WCAG AA is required by various government bodies in the US, EU, UK and Canada.
Snook's Colour Contrast Check provides a comprehensive check of whether a particular choice of foreground and background colours meets WCAG 2.2 standards for brightness difference, colour difference and contrast ratio.
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.
WCAG 2.0 text contrast ratios Font size Not Compliant Level AA Level AAA Normal < 4.5 4.5 to 7.0 > 7.0 Large (18 pt or 14 pt bold) ... Colour Contrast Check;
You can check contrast level using the WebAIM contrast checker by setting the foreground color to the blue link color. Contrast should be at the minimum WCAG AA level and, whenever possible, at WCAG AAA level. Wikipedia:Manual of Style/Accessibility/Colors has a set of colors that comply with WCAG AAA and WCAG AA for unvisited links and normal ...
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 ...
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.