A whole world is presented in front of the eyes of a gamer. This world has shapes and colours. What do colours transmit? Is this considered in digital games? These are the main issues of this work. We are part of a culture which has been decanting meanings for ages, including those of colours. These coded meanings are shared connotations of feelings, sensations, atmosphere, thoughts, and moods. Repeatedly, this symbolism is used without realizing how colours communicate. So, if colours can express, gamers would get messages which contain reactions and sensations. Diverse elements of digital games will be taken into account: characters, landscapes, clothes, objects, interfaces. A better understanding of the uses of colours would improve game experience. Keywords colour, emotion, psychology, game aesthetic, game art