Full color hair is a term that can refer to a few different things. Most commonly, it is used to describe hair that has been dyed all over with one color. This can be a single process color, which means that the hair was dyed one solid color from root to tip. It can also be referring to hair that has had multiple colors applied to it, such as highlights, lowlights, or ombre. In this case, full color hair would mean that every strand of hair has some sort of color applied to it.
The cost of full color hair will depend on a few different factors, such as the length and thickness of your hair, the type of coloring service you're getting (single process vs. multiple colors), and the salon you're visiting. Generally speaking, you can expect to pay anywhere from $50-$200+ for full color hair services.