Validation - Web Standards: Mastering HTML5, CSS3, and XML - page 447

Figure 14-9. Section of an accessible menu rendered by WAVE
While WAVE is a general accessibility tool focusing on markup, there are much more specific tools as well. For
example, there are several free online tools for evaluating the contrast between text color and background color, such
as the Color Contrast Analyzer [22], the Luminosity Color Contrast Ratio Analyzer [23], or the index of color texts on
white background provided by the University of Wisconsin [24].
It is important to keep in mind that no accessibility tools can perform a complete evaluation by any means.
With the introduction of new semantic elements in HTML5, care must be taken to use the latest accessibility
checkers available.
The final accessibility test is always a real-life test that involves evaluation performed by people with disabilities.
Validating Mobile-Friendliness
With the enormous popularity of mobile browsing, it is vital to test your web sites on mobile devices. However, it is
practically infeasible to check web sites on all kinds of mobile devices. Fortunately, the W3C mobileOK Checker at
http://validator.w3.org/mobile/ can help you analyze the suitability of your web pages for mobile browsing [25].
The mobileOK Checker applies the tests defined in the W3C Recommendation “W3C mobileOK Basic Tests 1.0” [26],
categorizes failures, and gives useful error descriptions (Figure 14-10 ).