Use TPGi's free colour contrast checker to optimize your content - including text and visual elements - for individuals with color-blindness or low vision impairments.

A first-of-its-kind solution that delivers assistive technology user feedback directly to the organizations seeking to deliver accessible digital experiences.

Free and open source. Solve accessibility issues before they reach your customers.

aDesigner is a disability simulator that helps designers ensure that their content and applications are accessible and usable by the visually impaired.

A website for getting different information for colors (different formats, complementary color) , especial a color blindness simulator.

Colour contrast checker to check for accessibility issues.