Sim Daltonism - From the perspective of a color blind person, some colors are impossible to distinguish.
Color.review - Colors that look and work great for everyone.
Colour Blindness Simulator - Use our Colour Blindness Simulator to reveal how your images may appear to users with a variety of...
Colorbox.io - Create accessible color systems 🎨
Colorblind Web Page Filter - Enter a URL, and this tool will render it as someone with color blindness will see it.
Stark - Contrast check and color blindness simulator for Sketch.