(…) The concepts for a film adaptation of At The Mountains of Madness have been in Guillermo del Toro’s head for decades, with the acclaimed visual artist admitting to having an obsession with the story as far back as his childhood. A script was first penned by del Toro alongside frequent collaborator Matthew Robbins, who also aided the director with the writing of Pinnochio and Crimson Peak, as early as 2003. The screenplay was pitched by the pair to Warner Brothers multiple times, but the entertainment repeatedly turned it down, caught up on del Toro’s insistence on an R-rating. (…)
That translates into film as “a shimmery pink” apparently (if you’ve seen the film).
Which is not what Lovecraft wrote. There has been a B&W movie adaption of that book; at least they could imagine that the “colour” was “out of space”.