interior color, help needed

[mapesken]

I recently had my way to hot whenever the sun is up metal building covered with closed cell foam.

I plan on installing white liner panels to the girt marked in yellow.

Any recommendations on a color for the foam that will be between the liner panels and the roof insulation?

This was an in progress pic. And yes the panel above the door above the beam is now covered with foam.

Thanks In Advance