Color is the characteristic of visual perception described through categories such as red, blue, and green. It arises from the way objects reflect or emit light, which is then detected by the human eye. The perception of color is influenced by the wavelengths of light; different wavelengths correspond to different colors. Colors can be classified into primary colors, such as red, yellow, and blue, which can be mixed to create secondary colors like orange and purple. The study of color involves various fields, including art, design, and science, each exploring how colors affect emotions, aesthetics, and visual communication.