Hair color can be associated with certain skin types, eye colors and even illnesses. Hair color depends on the amount of melanin in the hair. The more melanin is available, the darker the hair color is observed. There are many colors of hair, from pale yellow (blonde) to deep black. The hair colour depends on the geographic area. Deep brown and black people live in the Middle East, North Africa, and Southern Europe, people with darker hair live in East Asia, South Asia, tropical (Sub-saharan) Africa and The Americas; people with lighter brown hair live in western, central & eastern Europe, people with yellow/blond hair live in northern Europe, and reddish-haired people live in the British Isles. All the people differ from each other in hair color and texture.
 There are such shades of hair’s color as:
1) brown, brunette, mahogany, chocolate, cinnamon, dark, chestnut
2) jet black, raven, midnight, dark, sable, ebony, onyx, black, domino
3) flaxen, fair, tow-headed, blonde, sandy blonde, dirty blonde, strawberry blonde, honey, golden, platinum blonde
4) auburn, chestnut, red, fiery, redhead, titan, russet, ginger, scarlet, cinnamon
5) silver, salt and pepper, white, gray, alabaster, snow, platinum.
Many of these colors are not natural.
Hair color changes with age. When people become older, their hair gets grey, then it turns to white. At 40 people have some gray hair, but it can appear earlier, at the teens and twenties for some, or even in childhood. The appearance of grey hair depends on genetics. There are cases of the birth of grey-haired children. Hair becomes grey and white through decrease of pigmentation and melanin production. Hair without pigment becomes grey. Don’t believe people who promise any panacea against grey hair. Hair dye is good to hide grey hair.
Genetics can explain why people have this or that color. Hair color is controlled by gene pairs. But genetics can not explain the different shades of colour and their change. One gene, which is a brown/blonde pair, contains a dominant brown gene and a non-dominant blonde gene. People with such genes can have brown or blond color. The other gene pair is a not-red/red pair, where the "not-red" gene dominates and the gene for red hair is non-dominant. The person with red-haired genes will have red hair, but its shade will be either auburn or bright reddish orange. A black gene is available among people with dark skin.
Hair color depends upon some medical conditions and deceases.
1) Albinism is an absence of pigment in human hair, eyes or skin. People suffering from it have the pale blue eyes, the pale blonde hair and pale pink skin.
2) Vitiligo is the patchy absence of pigmentation in hair and skin colour caused by the imbalance in immune system.
3) Malnutrition can lead to the appearance of lighter, thinner, and brittler hair. When the production of melanin is decreased and there is no proper nutrition dark hair may get a reddish or blondish color.
4) Early greying can be caused by werner syndrome and pernicious anemia. Hair can darken temporarily after inflammatory processes, after electron-beam-induced alopecia, and after some chemotherapy procedures.
Hair color can be changed chemically. After this procedure the natural color pigments are chemically changed. The choice of hair color depends on your natural color. People with very dark hair can not be blondes. Your new color is a combination of your old color level and tone. When you color your hair you should lighten it. During the process of lightening hair goes through several stages of lightening from the darkest to the lightest. After the lightening process unwanted color pigment is created. To correct this undesired undertone, a necessary color is added for the creation of desired tone. During the process of lightening warm or red and yellow undertones are produced. The mixture of red and yellow produces orange. If you don’t want to have orange hair you should cancel these undertones leaving for a longer time for the obtaining of warm tones. The more time the color mixture is left on your head the more different color you can obtain. It is good to check color on a separate strand at first. Do not be afraid of doing more than one test strand before doing overall color and always do it on uncolored hair. But never color hair that was colored with henna or metallic dyes.
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