Hair coloring is a popular way to change the color of one's hair. There are various synonyms for hair coloring such as hair dye, hair tinting, hair shading, hair pigmentation, hair toning and hair tint. Hair dye is the most commonly used term for hair coloring and it can be permanent or semi-permanent. Hair tinting is a temporary method where the color is applied to the surface of the hair strands and can be washed out easily. Hair shading is a method where different shades of the same color are applied to create dimension in hair color. Hair pigmentation is another term used for hair coloring which refers to the process of adding color to the hair shafts. Hair toning is used to neutralize any unwanted tones in hair color while hair tint is used to brighten the existing hair color.