Adult.
Metallic Rat Snakes have complicated color schemes that tend to defy
easy description. To really appreciate the intricate colors and patterns
they have to be studied in various lighting and positions. These
animals are able to alter their general appearance, sometimes quite
dramatically, in response to different environmental/seasonal
conditions.
The intensity of the longitudinal stripes seems to wax and wane over the course of a
season as well. The misty remains of the juvenile pattern often
influences adult pigmentation.