What's new

Colored foam boards

I want to replicate photos similar to these ones: mod edit - please upload any relevant images to the forum.

In the background of these photos, it looks like a foam board has been used. I wonder:
- Do you think this is natural day sung light or is this in a dark room with lights?
- Are the background boards colored in reality or has there been som PS magic to edit the same board into different colors?

Fred J