Color Blindness Previewer
CIE-based simulation matrices (Brettel/Viénot). Approximate but standard.
Normal
Protanopia (red-blind, ~1% M)
Deuteranopia (green-blind, ~1%)
Tritanopia (blue-blind, <0.1%)
Achromatopsia (total)
About this tool
Color Blindness Previewer is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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