Design theory is a framework that explores the principles and processes involved in creating effective designs. It encompasses various disciplines, including graphic design, industrial design, and architecture, focusing on how elements like color, shape, and texture can be combined to achieve specific goals. At its core, design theory emphasizes the importance of user experience and functionality. It encourages designers to consider the needs and preferences of their audience, ensuring that the final product is not only visually appealing but also practical and accessible. This approach helps create designs that resonate with users and fulfill their intended purpose.