"…in every possible theory of colors -and here again we go theoretical- blue is the color of separation, of despair, of loneliness, and it goes from Goethe, to the Iranian Sufis, to the Japanese theories. But I don’t care about theories. Berlin is a town in which many things are blue, or many things are yellow. And this blue-yellow contrast is the contrast between the two apartments that the wife inhabits in the film. She lives in a blue one, in which there is separation, and she lives in a yellow one, in which she recreates something which is for her, like hope and future and whatever it is. So it came naturally looking at the town, looking at the place where we were shooting."