This document discusses colour correction and colour psychology. It defines colour correction as altering the hue, saturation and lightness of an image to improve colour balance, change the tone of a shot, or change how viewers feel. It explains that hue is the specific colour, saturation is the intensity or purity of a colour, and luminance is the brightness. It then discusses how different colours have psychological associations that can make people feel emotions like anger, passion, warmth, coolness, sadness or calmness.