Hue is a term used in color theory to describe the attribute of a color that allows it to be classified as red, blue, green, or any other color. It is one of the main characteristics of color, along with saturation and brightness. For example, when we talk about the color blue, we are referring to its hue, which distinguishes it from green or red. In art and design, understanding hue is essential for creating visually appealing compositions. Artists often use different hues to evoke emotions or set a mood in their work. For instance, a painting with warm hues like orange and yellow can feel inviting, while cool hues like blue and purple may create a calming atmosphere.