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ABSTRACT
The emphasis we place on our sense of colour, as well as its emotional effects onus, are honored by painters, poets, scientists and architects who try to understand and qualify its effects on humans and life in general. We require light to view colours and appreciate the beauty it brings to our environment. However, the impact of light and colour on humans arecomplex. When looking up 'What is colour?' in dictionaries, the reader discovers that it is defined in general by negatives: 'the visual property of light that is not related to lightness, saturation, texture, glossiness, or translucency.' The positive value of such technical definitions is under played. Our species and the impact it has on us are brought to life by colour. From a survival standpoint, it is the major sense used to discern between ripe and unripe fruit. It keepsus safe from tainted foods and notifies us about the quality of beer or honey. It also indicates the strength of a cup of coffee or the grade of tomato puree.