"Colour cinematography tends to brighten and cheapen natural colour. The problem was to counteract that. I realised that colour in films is nearer to painting than to the stage. Now if you look, for instance, at a crimson cloak painted by El Greco, you’ll find that what first appears as a mass of colour is in fact a subtle blending of all sorts of shades, with patches of pink and blue and purple and green. So I treated the colour the way a painter would."