Color representation refers to the way colors are defined and displayed in various systems. Common models include the RGB model, which uses red, green, and blue light to create colors on screens, and the CMYK model, which combines cyan, magenta, yellow, and black inks for printing. Each model has its own method for mixing colors, making them suitable for different applications. In digital design, color representation is crucial for achieving the desired visual effects. Tools like Adobe Photoshop and Illustrator utilize these models to help designers select and manipulate colors effectively. Understanding color representation ensures consistency across different media and devices.