Witt’s Theory of color constitution Witt’s theory of color constitution establish in 1876. Witt argue a theory per that the colour of a substance is principally attributable to the presence of associate unsaturated cluster referred to as  Chromophores (Greek chroma‐color, and phores‐bearing). The necessary chromophores are First ‐C = C second ‐C = N ‐C = O ‐N = N ‐NO2 ‐Quinoidrings The …