What is colour?

Question

What is colour?

Accepted Answer

The correct option is 1: Property of light.
Color is fundamentally a phenomenon of physics and optics, not an inherent quality of an object. The existence and perception of color are entirely dependent on light. Specifically, color is the visual perception that occurs when the human eye receives different wavelengths of the electromagnetic spectrum, which is the definition of visible light. When white light—which contains all colors—strikes an object, the matter in the object absorbs some wavelengths and reflects others. The reflected wavelengths are the ones our eyes perceive, and our brain interprets, as a specific color. Therefore, the essential and defining property of color is its source and medium: light.

The incorrect option is 2: Property of emotion.
While color undoubtedly has a profound psychological impact and is a critical tool for artists to evoke emotion, emotion is a subjective human response, not the physical nature of color. The use of color in art therapy or to symbolize feelings is an aesthetic application of color theory. However, the foundational definition of color lies in the objective science of light, wavelengths, and human perception. Color's relationship to emotion is associative, secondary, and cultural, not intrinsic to its physical definition.

The incorrect option is 3: Property of drawing.
Drawing is defined as the act of making a picture or plan using lines and marks. Color is an element that can be *applied* to a drawing (as in painting or colored sketching), but it is not the defining property of drawing, nor is it what color *is*. The essence of drawing is form, line, and composition, which can exist perfectly well in monochrome. Conversely, color exists in the world—in rainbows, prisms, and light itself—entirely independently of the art of drawing.

The incorrect option is 4: Property of matter.
This is a very common misunderstanding. Matter is the vehicle for pigment or dye, but it does not intrinsically hold the color. A red apple appears red because its skin contains molecules that absorb all the wavelengths of light *except* for red. It is the red wavelength light that is *reflected* from the apple and travels to your eye that defines the color. The matter's molecular structure determines which light is absorbed, but the actual color is the light energy (wavelength) that is bounced off the matter, confirming that color is fundamentally a property of light.