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iPhone / iPad
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iColorTool provides color naming and video processing tools to assist those with color blindness.

Color Identification
Displays the name of the color at the center of the display. You can use this to

Color Blindness Simulation
Provides a simulation of the various types of color blindness. You can use these modes to demonstrate to friends, family, teachers and others how the world appears to you!

Color Blindness Assist
This mode helps to highlight colors that are likely to cause confusion - black indicates no confusion, white indicates a high chance of confusion. This mode may help reveal previously hidden details.

Color Separation / Color Shift
These modes display the different color channels separately. If you are deficient in a particular color channel, these modes may help you see the information you are missing.