An experiment was first conducted not in June of ‘82 as described in Colour Out of Space, but a century later during 1983. In a lab, professors were able to induce their subjects to see “Forbidden or impossible colors.” These are colors your eyes can’t perceive because of the way human eyes work. And yes, the experiment proved to be reproduceable, as was done in 2006.
- Crane, Hewitt D.; Piantanida, Thomas P. (1983). “On Seeing Reddish Green and Yellowish Blue”. Science. 221 (4615): 1078–80.
- Hsieh, P.-J.; Tse, P. U. (2006). “Illusory color mixing upon perceptual fading and filling-in does not result in “forbidden colors””. Vision Research. 46 (14): 2251–8.