Grid on painted wall

Art consultant Susan Blackman suggested thinking about a painted wall as a way to think about color with the grayscale Reflect grid.

Some quick renderings got me here:

 Reflect 1.0 | rendered on painted green wall

Reflect 1.0 | rendered on painted green wall

 Reflect 1.0 | rendered on painted blue wall

Reflect 1.0 | rendered on painted blue wall