Sim Daltonism - From the perspective of a color blind person, some colors are impossible to distinguish.
WhatColor - Helps colorblind People identify colors on mouse-over.
Colour Blindness Simulator - Use our Colour Blindness Simulator to reveal how your images may appear to users with a variety of...
Free Color Picker - An advanced color picker, screen magnifier and color palette manager
Coblis - If you are not suffering from a color vision deficiency it is very hard to imagine how it looks...
Colorblind Web Page Filter - Enter a URL, and this tool will render it as someone with color blindness will see it.