system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Gradual lightening / blue black colour shift in a tattoo is called:
assistant
The correct answer is  Changes in tattoo maturation Halo effect - extrusion of pigment on deposition near follicle Washing out / leaching/pigment migration-carrying away of pigment by macrophages on deep inseion Ref: Textbook of dermatosurgery & cosmetology, satish S savant, E-2,P-338.