Colour Contrast Tools for WCAG and Web Accessibility

[chris]

A few handy tools and info on testing colour contrast for accessibility:

The essence of accessible color contrast is simple. Given a foreground color and a background color, the contrast between those two must be distinguishable in a wide variety of environments, by individuals with different color perception abilities. Using the Web Content Accessibility Guidelines — WCAG — version 2.0, these contrasts are measured using an algorithm that compares the relative luminosity of the two colors and returns a ratio, which is to exceed WCAG’s recommended minimum.

http://www.practicalecommerce.com/a...-Measure-Color-Contrast-for-Web-Accessibility

And for general info on WCAG:

https://www.w3.org/WAI/intro/wcag