The sculpted outer wall of the front of the building, with backlit glass insets.
This area is minimally lit with a couple of small floodlights, and the colored lights behind the glass.
To the eye, it appears a uniform grey-brown concrete color.
The light is very "yellow" to the camera, yielding this orange/gold effect.
I shot upward and across a section of it to maximize texture detail, with the result resembling a cave or underground canyon structure.