code: def delta_e_cmc(color1, color2, pl=2, pc=1):
      
      color1_vector = _get_lab_color1_vector(color1)
      color2_matrix = _get_lab_color2_matrix(color2)
      delta_e = color_diff_matrix.delta_e_cmc(
          color1_vector, color2_matrix, pl=pl, pc=pc)[0]
      return numpy.asscalar(delta_e)
docs: Calculates the Delta E (CMC) of two colors.
  
      CMC values
        Acceptability: pl=2, pc=1
        Perceptability: pl=1, pc=1