code: def split_complementary(clr):
      
      clr = color(clr)
      colors = colorlist(clr)
      clr = clr.complement
      colors.append(clr.rotate_ryb(-30).lighten(0.1))
      colors.append(clr.rotate_ryb(30).lighten(0.1))
  
      return colors
docs: Returns a list with the split complement of the color.
  
      The split complement are the two colors to the left and right
      of the color's complement.