spectral wavelength and colors corresponding 
range of wavelength  (color absorbed) 
400-450(violet)----------> yellow green (supplementary observed color of solution)
450-480(blue)------------>yellow
480-490(green blue)--------> orange 
490-500(blue green)----------> red
500-560(green)----------------> purple
560-575(yellow green)-----------> violet
575-590(yellow)-------------------> blue
590-625(orange)---------------------> green blue
625-750(red)--------------------------> blue green