Indeed Roy Andersson was inspired by a painting of Rene Magritte.
I believe that Roy Andersson was referred to Surrealist artworks in his movies. Magritte had got an ambition to create an immersive and fantastical world on the canvas. So, one of the narratives of the movies of Andersson is pretty much similar to the manifest conceived by Magritte himself…
Even if an information I wrote here seems not so reliable as you expected, one fact remains definitely true: colors and atmosphere/scenery. They are indescribable identical, aren’t they?