Colour Blindness Simulator - Use our Colour Blindness Simulator to reveal how your images may appear to users with a variety of...
Coblis - If you are not suffering from a color vision deficiency it is very hard to imagine how it looks...
Stark - Contrast check and color blindness simulator for Sketch.
Color Oracle - Color Oracle is a colorblindness simulator for Window, Mac and Linux.
accessiBe - Making websites accessible to people with disabilities
RGBlind - Browser extension to simulate color blindness.