Tenon.io can identify 508 and WCAG 2.0 issues in any environment - even on your developer's laptop. Because production is a bad place to discover bugs.

Check your website for accessibility issues.

WebAIM: Color Contrast Checker

Ensure a proper contrast when choosing colors for your design.

Accessibility Wins: Google Chrome’s Color Contrast Debugger

Chrome Canary’s developer tools have an experiment where you can debug color contrast right in the style inspector.