Color saturation refers to the intensity or purity of a color. A highly saturated color appears vivid and bright, while a less saturated color looks more muted or grayish. For example, a bright red is highly saturated, whereas a dull red has lower saturation. Saturation is an important aspect of color theory, influencing how colors interact and are perceived. In art and design, adjusting saturation can create different moods and effects. Tools like photo editing software often allow users to modify saturation levels to achieve the desired visual impact.