Red hair (also referred to as titian or ginger hair) varies from a deep orange-red through burnt orange to bright copper. It is characterized by high levels of the reddish pigment pheomelanin and relatively low levels of the dark pigment eumelanin. People with red hair are often referred to as redheads. Approximately 1% to 2% of the human population has red hair.
Hair color is the pigmentation of hair follicles due to two types of melanin, eumelanin and pheomelanin. Generally, if more melanin is present, the color of the hair is darker; if less melanin is present, the hair is lighter. Levels of melanin can vary over time causing a person's hair color to change, and it is possible to have hair follicles of more than one color.
Hair coloring is used: to return gray hair to its previous color; to change hair color to a shade regarded as more fashionable or desirable; to return hair to its original color after chemicals (e.g. tints, relaxers, sun bleaching) have discolored it.
Blond or fair-hair, is a hair color characterized by low levels of the dark pigment eumelanin. The resultant visible hue depends on various factors, but always has some sort of yellowish whiteish color. The color can be from the very pale blond (caused by a patchy, scarce distribution of pigment) to reddish "strawberry" blond colors or golden-brownish blond colors (the latter with more eumelanin).
Brown hair is the second most common human hair color. Brown hair varies from light brown to almost black hair. It is characterized by higher levels of the dark pigment eumelanin and lower levels of the pale pigment phaeomelanin. Its strands are thicker than those of fair hair but not as much as those of red hair. People with brown hair are often referred to as brunette, the feminine form of the diminutive form brunet from brun (brown/brown-haired), the masculine form.
Auburn may be described as a hair color that is somewhere between brown hair and red hair. The word "auburn" comes from the Old French word alborne, which meant blond, coming from Latin word alburnus ("off-white"). The first recorded use of auburn in English was in 1430. In describing hair color, "auburn" is frequently misused as a synonym for "red", and correctly used to describe "ginger".
A blue rinse is a dilute hair dye used to reduce the yellowed (or translucent, showing scalp colour) appearance of greying hair on older women. The ability to see blue decreases with age, so an older woman perceives her uncolored hair to have a yellow-tinge, and the blue rinse brings the color back to a perceived normal color in their eyes. The blue rinse supposedly makes yellow-white hair appear blue-white, but an inexpertly applied blue rinse will leave a distinctly unnatural tinge behind.
Disappearing blonde gene is a hoax that has periodically surfaced in the media since 1865, with the most recent version starting in 2002. According to this hoax, the World Health Organization, or other experts, published a report claiming that people with blond hair "will become extinct by 2202. " The report was a hoax. Neither the WHO, nor any reputable expert has issued such a report. The extinction claim is based on an interpretation of recessiveness in genetics.
Black hair is the darkest and most common of all human hair colors internationally. It is a dominant genetic trait, and it is found in people of all backgrounds and ethnicities. It has large amounts of eumelanin and is less dense than other hair colors. Black hair is known to be the shiniest of all hair colors.
Hair dye stripping, commonly known as color correction, is a process used to rid the hair of unwanted color. Certain hair colors such as black, red, blue, purple and dark browns often can cause problems for a person seeking to change his or her hair color back to the original color.
Hair highlighting refers to changing a person's hair color, using lighter (or darker) colors to color strands of the hair in different sizes. There are four types of highlights: basic foil highlights, hair painting, chunking and low-lighting. They are very common for teenagers and done in expressive and usually natural colors. The categories of the highlights last are: temporary, semi-permanent, demi-permanent, and permanent.