This document discusses different graphical styles used in video games and how color theory relates to each style. It describes the four main graphical styles: photorealism, which aims to make games look realistic; cel-shaded, which mimics comics; exaggeration, which amplifies character features; and abstract, represented by puzzle games. Each style uses color to set certain moods - photorealism and exaggeration use dark colors for seriousness while cel-shaded and abstract use bright colors for fun. Examples are given of games representing each style.