Which term describes color that is lost from the face yarns in a small area, resulting in a lighter shade?

The term that describes color lost from the face yarns in a small area, resulting in a lighter shade, is referred to as discoloration. This phenomenon typically occurs due to various factors such as chemical reactions, spills, or exposure to certain environmental conditions that can affect the carpet's appearance. While discoloration implies a loss of vibrancy or original color, it does not necessarily indicate that the color is being chemically altered or intentionally removed, which distinguishes it from terms like bleaching. Dulling would imply a loss of brightness without necessarily indicating a change in color, and fading pertains more to a gradual loss of color over a larger area due to prolonged exposure to light or wear. Thus, discoloration accurately captures the essence of localized color loss resulting in lighter shades.