color of every kind is a feature of all our lives. We particularly value the color of our hair. We may perhaps quickly pull out the first gray hairs that we notice - but we all know that will not be the end of the matter. Once the hair follicle has stopped producing pigment cells, it is highly unlikely to start again. The 'new' hair will be gray too.
   Hair color is due to the present of melanin pigments in the cortex of the hair shaft. As we have seen there are two kinds of pigment, eumelanin and phaeomelanin. The cuticle is colorless and translucent: it looks like a polythene sheath. The color we see is due to a combination of light that has passed through the colored cortex and light that is reflected by the smooth cuticle.If there is no pigment in the cortex, the hair looks white.
   The color of hair can be changed in only three
ways:

• it can be made lighter, either wholly or in part
• it can be made darker, either wholly or in part
• it can be changed to an entirely different shade, either wholly or in part.