How do I make my silkies ears blue again?

[Celeste Cannon]

Hey y’all, my silkie roo has lost the blue coloring in his ears and I really want it back. Is there any way to get it back? Any specia food I could give him or something I could put on the ears? Here’s a pic of my handsome boy

 

[sourland]

He's a beauty, but is destined to have white ear lobes for the rest of his life.