Colour influences our daily lives, whether we are aware of it or not. Sight is our main sense, a large portion of our brain is primed for visual stimuli. Finding and determining potential food is one of the uses for survival. In addition we don't want to eat poisonous plants or animals. Colours help us to find food "at first sight" since red berries between the green branches are easily spotted. It seems we perceive three primary colours, red, green and blue. The theory about the way we perceive colour is not completely elucidated, though. Since the eye and brain are almost inextricably linked it is clear that neurological and even psychological factors are not to be ruled out in the perception of colour.
