Yellow Colour, it flags potential danger and sign of prohibitions

How would you react to a kitchen in which your sense of organization could find an ally? How about an area where homework could be done more effectively, or a family room where good humour would prevail? To be sure colour is not the only factor in creating ambience in a room but it does contribute a lot to it. And yellow can help you create such a pleasant environment in many ways.
Yellow is bright, happy and stimulating. It is associated with intellect and the expression of thoughts. It improves memory, judgement and the capacity for decision-making. Yellow also promotes the assimilation of new ideas and the capacity for understanding varying points of view. Moreover, it seems that yellow helps people become more organized and to adopt an optimistic attitude, something one can appreciate in any room.
People who like to wear yellow are interesting and stimulating. They thrive on being active and taking up challenges. They search for happiness.
Yellow, therefore, is an excellent choice in decorating a room that is dedicated to intellectual pursuits. However, it is important to use it in connection with a colour such as blue that brings a measure of security and calm to the décor. Used alone in large quantities, yellow can prove to be too stimulating for the nervous system.

Nothing illuminates a décor like yellow, the colour of the sun, of light, of summer. In matters of decoration, yellow is your strongest ally when it comes to brightening a dark room or one that faces north.
Over the ages and in a number of cultures, yellow has variously been associated with the emperors of China, the arrival of spring and Easter, the generosity of the land at wheat and corn harvest time, Buddhist philosophy and a number of other images.
Yellow draws people's attention. It is used to flag potential danger and prohibitions on our highways: traffic lights turn yellow (amber) before turning red, road signage used to forewarn us of construction work and other dangers are yellow as are double lines used to prohibit passing.
In advertising, yellow is used to attract the eye. Publishers of telephone directories (Yellow Pages) understood the phenomenon a long time ago. And New York cabs are yellow.
In sports, yellow carries different meanings. In European football (soccer), a yellow card is used to warn players of fouls. In cycling, the yellow shirt is emblematic of supremacy in the world-renowned Tour de France.
But yellow does have a less positive side to it. It is associated with illness. Seagoing ships, for example, reserved their yellow pavilions as quarantine quarters. Yellow is also associated with cowardice and newspapers that exploit sensationalism.