Sim Daltonism - From the perspective of a color blind person, some colors are impossible to distinguish.
accessiBe - Making websites accessible to people with disabilities
Colour Blindness Simulator - Use our Colour Blindness Simulator to reveal how your images may appear to users with a variety of...
Page Speaker - Modern web accessibility tools for agencies & webmasters
Colorblind Web Page Filter - Enter a URL, and this tool will render it as someone with color blindness will see it.
Koa11y - Automatically detect accessibility (a11y) issues on webpages