In general, people talk about two groups of colours: warm colours and cool colours.Psychologists think that there are also two groups of people: people who prefer warm colours and people who prefer cool colours.

The warm colours are red, orange, and yellow. Where there are warm colours and a lot of light, people usually want to be active. People think that red, for example, is exciting. Sociable people，those who like to be with others, like red. The cool colours are green, blue and violet.Unlike warm colours, these colours are relaxing. Where there are cool colours, people are usually quiet. People who like to spend time alone often prefer blue.

Red may be exciting, but one researcher says that time seems to pass more slowly in a room

10with warm colours than in a room with cool colours. [1 He believes that a warm colour, such as

red or orange, is a good colour for a living room or restaurant. People who are relaxing or eating do not want time to pass quickly. Cool colours are better for offices or factories if the people who are working there want time to pass quickly.

Why do people think some colours are warm and others are cool? Perhaps warm colours

15remind people of warm things and cool colours remind them of coo things. Sunlight and flame usually appear red and yellow, while night and water seem to be blue and green.