Background information (Yellow Hope and Happiness Yellow is sunshine.It is a warm color that,like red,has conflicting symbolism.On the one hand it indicates happiness and joy. Yellow is cheerful.On the other hand yellow is the color of cowardice and deceit. Besides,because of the high visibility of bright yellow,it is often used for hazard signs and some emergency vehicles.Background information (Yellow )  Hope and Happiness Yellow is sunshine. It is a warm color that, like red, has conflicting symbolism. On the one hand it indicates happiness and joy. Yellow is cheerful. On the other hand yellow is the color of cowardice and deceit. Besides, because of the high visibility of bright yellow, it is often used for hazard signs and some emergency vehicles