Which term describes the natural color of hair without any treatment?

The term that best describes the natural color of hair without any treatment is "virgin hair." Virgin hair refers to hair that has not been chemically altered or treated in any way, meaning it retains its original color and texture. This includes not being dyed, permed, or subjected to chemical straightening processes.

Understanding the terminology is essential in cosmetology as it helps professionals communicate effectively about hair types and conditions. Recognizing virgin hair is particularly important when considering hair treatments or coloring, as it indicates the hair's natural resilience and baseline characteristics.

In contrast, options like artificial color refer to shades created with dye or color products, while processed hair indicates that the hair has undergone some chemical treatment, compromising its virgin status. The term natural shade could apply but does not specifically convey the state of being untreated, which is the core meaning of virgin hair.