Hair color refers to the natural or artificial pigment of a person's hair. It can range from shades of black, brown, blonde, red, and gray, to more vibrant and unconventional colors like blue, pink, or purple. People often change their hair color for a fresh look, to cover gray hair, or to express their personality through bold, creative choices. Hair coloring can be done using permanent dyes, semi-permanent dyes, or temporary color sprays, and the results can vary from subtle highlights to full color changes.