A color model is a mathematical representation of colors in a specific format, allowing for consistent color reproduction across different devices. Common color models include RGB, which uses red, green, and blue light to create colors, and CMYK, which combines cyan, magenta, yellow, and black inks for printing. These models help designers and artists communicate color choices effectively. Each model has its own color space, defining the range of colors it can represent. Understanding color models is essential for tasks like digital imaging, graphic design, and printing, ensuring that colors appear as intended in various media.