How to apply liquid retin-a?

How do we apply the WCAG 2.0 guidelines to retina and XHDPI displays?

• Is it safe to assume that text on Retina screens is inherently higher contrast? If so, what contrast ratio should we aim for?

• Answer:

  Luckily, the web content accessibility guidelines are written to be device independent. That means you can use the same rules regardless of your display's resolution, and you need to follow the same rules. The rules for contrast are outlined here: http://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html .  You can also use contrast checking tool. This one by WebAIM tells you if a color combination passes for text above or below 18px font size: http://webaim.org/resources/contrastchecker/. In in any case, you'll never be able to know if the person who is visiting your site will have a Retina display. Hope this helps!