The HSL model is a color representation system that describes colors using three components: Hue, Saturation, and Lightness. Hue refers to the type of color, such as red or blue, and is measured in degrees on a color wheel. Saturation indicates the intensity or purity of the color, while Lightness represents the brightness of the color, ranging from black to white. This model is often used in graphic design and digital art because it aligns more closely with human perception of color. By adjusting these three components, artists and designers can create a wide variety of colors and effects, making it a versatile tool in visual media.