To see or not to see?

Appearance is a key factor for my final product because it will either be a camouflaged object or a highly visible object.

The working model is currently a light grey colour as I originally thought it would help to show how the concept works, by improving the visibility of the PIR sensors which surround the base.
However, this may change in time as I believe that a darker colour would not only improve its appearance but also help to create a sense of concealment. After all, the purpose of the PIR on the final product is to activate the light and cause surprise.