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Hair colour is decided by the varying amounts of pigments contained in

       the hair structure.  Pigments are contained in two types of melanin

       Eumelanin contains the dark blue pigments only. (Please see Fig. 13)

       Phaeomelanin contains both the red and yellow pigments.  Melanin is

       found in the cortex and the matrix cement but not in the cuticle cells

       which are completely three of melanin.

       Cuticle cells work the same as prisms absorbing white light and splitting

       it into individual colour wavelengths and reflecting the corresponding
       wavelengths to the pigments.
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