So am I crazy or is my old normal ball python going grey?!!

After this last shed last week my wife pointed out his colors are fading. The darks are turning white and the brown shads are lightening up.

His is about 19 years old now so is this normal? I think its kinds cool though.
-----
1.0 Ball Python
1.0 Burmese Python
0.1 Albino Banana California Kingsnake
1.0 Common Snapping Turtle
1.0 Eastern Painted Turtle
1.0 Eastern Box Turtle