First published in Astounding Science Fiction, January 1950.
There’s a tendency to over-think the relationship between surrealism and science fiction. The entry in the Science Fiction Encylopedia (1999 print edition) refers you on to the absurdist SF, illustration and the New Wave. There doesn’t seem anywhere to address the fact that SF has been a vehicle for bringing dream-like imagery into the real world since the beginning.
SF grew up at the same time as the surrealist movement, and shared its post-war Golden Age. Its rational and analytical approach gives its imagery the same pin-sharp focus as Dali, Magritte or Max Ernst. This story presents us with a complex scientific justification but its premise wouldn’t be out of place in a movie by Luis Bunel: what would happen if colour drained from the world.