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Hmm... I'm not sure about that. It's an interesting question. It's equivalent to the question: can we create two images on a computer monitor that appear the

• bnegreve 12y ago
  > can we create two images on a computer monitor that appear the same to a person with normal color vision yet appear different to a colorblind person? It surely depends on the type of colorblindness, there are many [1]. [1] http://en.wikipedia.org/wiki/Color_blindness http://en.wikipedia.org/wiki/Color_blindness If you're monochromate or dichromate, I doubt that this is possible. Monochromates or dichromates are simply missing one or two color components out of three. If you have anomalous trichromacy, you can by creating a monitor with pixels of different colors. In any case, I don't see how it is possible to identify a tetrachromate with a trichromate (RGB) monitor. I tried to increase the contrast and change the hue of the color test to understand what was different between the apparently similar colors but I wasn't able to find any difference.