An article by Eddie Wrenn, published on Mail Online and titled The incredible images that show how a colour-blind person sees the world (and why it might explain Van Gogh's genius) reports that Kazunori Asada, a Japanese scientist, by using a tool called "Chromatic Vision Simulator," has argued that Van Gogh was color vision deficiency.
In the same page are published the results of Asada's study, and we can see some Gogh's pictures compared with the "colourblind version[s]."
Whereas Kyle Chayka, in an article published on Blouin ArtInfo (International Edition), noted:
There are clear issues with Asada’s argument. First, the versions of the paintings he uses aren’t necessarily true to life. Our dependence on digital screens means that it’s hard to make colors remain stable on a computer-to-computer basis. Asada’s images aren’t of the highest quality, and there’s a strong chance the true paintings look completely different. There’s also the philosophical argument. How can we argue that van Gogh’s paintings look better through a filter? To assume that the painter’s provocative artistic choices were simply the result of a medical condition is to completely disregard his own creativity. Van Gogh’s colors are meant to clash; the unorthodox pairings were part of the Post-Impressionist and Fauvist aesthetic. Or were Paul Gauguin and André Derain also colorblind?
Was Van Gogh really colour blind?