Colour is an important aspect of fashion design, as it can evoke emotions and convey a certain message or mood. Different colours are associated with different psychological properties, such as red being associated with energy and passion, blue with calmness and serenity, and yellow with optimism and happiness. In fashion runways, designers often use fashion colour to create a specific theme or aesthetic for their collection. For example, a collection with mostly warm colours like red and orange may be intended to convey a sense of energy and passion while a collection with mostly cool colours like blue and green may be intended to convey a sense of calmness and serenity.