Colour is light. Light is constructed of light spectrum by which human can observe and name each shade differently. Colours of the visible light spectrum include red, orange, yellow, green, blue and violet.
Human see a colour when light falls on the object and reflects back to our eyes. Each people see colour differently because the object absorbs and reflects different frequency intervals, which are associated with the physical property of such object. We can identify the characteristics of colour by three factors as follows:
3. Chroma or Saturation