If a client has had to come in for a touchup for a missing spot, the color that is implanted in that spot is identical to the healed color that is surrounding it. Please remind your clients of the fact that the colors oxidize and turn dark.
We always tell my clients that the colors will oxidize by 30-40% during the next 3-4 days.
After this, the color will lighten by 35-45% on approx. the 5th day and match the color that was first implanted in about a month.