Hair color has three major purposes. One is to add shine, which is the hair shaft’s ability to reflect light. Two is to compliment skin tone and eye color by refining or enhancing the tone and/or shade of ones natural pigment. Tone is defined as how warm or cool the hair is and shade is defined by how light or dark the hair is. The third purpose is to create balance, whether for blending grey dealing with re-growth of a previous color application or evening the effects of the sun.