The RGB model is a color representation system that uses three primary colors: Red, Green, and Blue. By combining these colors in various intensities, a wide spectrum of colors can be created. Each color is typically represented by a value ranging from 0 to 255, allowing for over 16 million possible color combinations. This model is widely used in digital displays, such as computer monitors, televisions, and smartphones, where light is emitted directly. The RGB model is essential for graphic design, photography, and web development, as it helps in accurately reproducing colors on screens.