It looks more like natural yellow scale color to me. I don't see signs of damaged skin and it looks fairly even in color away from the gray shedding areas.
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!