Senior colourist Angela Cerasi explores the meaning behind the colour blue and how its various shades, hues and tones are used in visual language to subliminally layer a story and add greater depth to a film.   TOPICS DISCUSSED IN THIS EPISODE:   The shades of blue Blue light in the natural world The link between blue and sadness Blue as powerlessness Working with blue in the colour grade The "teal and orange" look Using blue in the colour grade to create atmosphere Moonlight The ocean The feature colour is...