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Kazunori Asada used visual filters to see how the paintings looked to the colorblind. The experiment produced some interesting results and musings: Was van Gogh partially color vision deficiency (anomalous trichromat)? Perhaps using a strong color vision deficiency (dichromat) simulation was the wrong approach. How about carrying out the simulation by removing the middle portion of normal color vision, maybe then I could see van Gogh's pictures in a better light? The color choices for van Gogh's popular paintings seem less out there with the filters. The greens in the sky of Starry Night, for example turn to yellows.