Any truth to the practice of BLACK painted parts dissipating heat better?

This is my understanding. Some are thinking only of light you can see. My first modified car, a 65 Falcon, had the headers painted white. The engine builder told me that white headers keep underhood temperatures cooler. My engine pulled air from the engine compartment. Of course we think of white paint reflecting light but heat is the same as light. It's just not all visible to our eyes. White paint on headers reflects heat inward so more stays contained in the exhaust. Black painted headers are better at dissapating heat which is good if you have a cool air intake setup like a hood scoop.