What is 'permanent hair color'?

What is 'permanent hair color'?

Permanent hair color is hair color that contains ammonia and peroxide. And the reason that they called it permanent hair color is that it makes a chemical change to the structure of the hair. So permanent hair color you can get in a hair salon, you can also get it in a box at the supermarket. And it's a type of product that's really designed for gray coverage, and changing your hair anywhere between one and two shades. Maybe three shades, depending on the particular product.