Re: FWIW, LeGuin was involved in the 1980 movie
In the 1980 movie it just looks like they desaturated it, and it's not in as much of the movie as it is in the book. It gets undone before
the apocalypse, probably so they didn't have to keep using the effect, but I wasn't wild about that change.
The 2002 version doesn't have the graying.