Colour and Emotions People attach different meanings to colours. The psychological basis for understanding colour and its influence on emotions is not well understood. There is no simple explanation for the interaction of colour and emotional response. Some evidence suggests that the light of different colours enters the eye and indirectly affects the hypothalamus, which in turn affects the pituitary gland. The pituitary gland controls the hormone Educational programmes of the Kentucky Cooperative Extension Service serve all people regardless of race, colour, age, sex, religion, disability, or national origin. 2 levels and perhaps thus our moods. Some experiments have suggested that colour may influence our emotions. One experiment showed that in a room coloured in red light, time was overestimated while in green or blue light, time was underestimated. In another study, workers lifting black boxes complained they were too heavy; but when the boxes were painted green they felt lighter. During the Middle Ages, Blackfriars Bridge in London, a gloomy black structure, was noted for its record number of suicides until the bridge was painted bright green. However, attempts to establish scientifically the effects of colour on the mind have not been conclusive. Reactions to colour may be very individual and due to associations. Red walls may reassure some while causing discomfort for others.