Interior color design is a comprehensive design system integrating many factors, and light and shadow are also indispensable. In interior design, there are many factors that affect the change of indoor light, such as the change of season, climate and artificial environment, and the interior decoration environment is also a factor, such as the texture and brightness of processing, the types and operation of decorations and window decoration, etc.Designers must carefully analyze the favorable factors and limiting factors of subjective and objective conditions in the design process, and systematically, systematically and hierarchically solve the design requirements and conditions one by one. It is required that every design should be treated as a unified whole, and there should be a kind of overall feeling and understanding throughout the process of design conception and behavior.