Yellow is a bright and cheerful color often associated with sunshine and warmth. It is one of the primary colors in the RGB color model and can be created by mixing red and green light. In nature, yellow is commonly found in flowers like sunflowers and daffodils, as well as in fruits such as bananas and lemons. In color psychology, yellow is linked to feelings of happiness and optimism. It can stimulate mental activity and is often used in design to grab attention. However, too much yellow can be overwhelming, so it is typically used in moderation in art and decor.