Accessibility resources free online from the international standards organization: W3C Web Accessibility Initiative (WAI).

Create color systems with consistent lightness and contrast.

axe is the world’s most popular accessibility testing toolkit built. Visit our website to start building accessibility into your development process.

Check the contrast of your color design for accessibility base on Web Content Accessibility Guideline (WCAG)

AChecker is a Web accessibility evalution tool designed to help Web content developers and Web application developers ensure their Web content is accessible to everyone regardless to the technology they may be using, or their abilities or disabilities.