Colour Testing - for Colour Blindness & Deficiencies
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Photoshop CS4 accessibility overview
Adobe® Photoshop® CS6 software is the definitive solution for professional web photo editing and artwork creation.Color blindness or color vision deficiency is the inability or decreased ability to see color , or perceive color differences, under normal lighting conditions.
Color blindness
This command shows a dialog window when executed. This window can be used to manage the display filters and their options. Display filters are not to be confused with the filters in the -menu.