Black is a colour which results from the absence or complete absorption of visible light. In fact, black isn’t on the colour wheel because it isn’t considered a colour.
Black is the colour that does not emit or reflect light in any part of the visible spectrum. It absorbs all frequencies of light. Hence, black is often considered as the lack of all colours of light or an exhaustive combination of multiple colours of pigment. Although black is sometimes described as “achromatic” or hueless, in practice, it can be considered a colour.