Hues refer to the distinct colors that we perceive, which are determined by the wavelength of light. Each hue can be identified on the color spectrum, ranging from red to violet. Hues are fundamental in art and design, as they help convey emotions and create visual interest. In color theory, hues can be mixed to create new colors, such as secondary hues like green, orange, and purple. Additionally, hues can be modified by adding white to create tints, or black to create shades, allowing for a wide variety of color variations in various applications.