My podcast Coffee Roasting Navigated is about the different approaches in coffee roasting. We start by exploring the different ways to decide how to stop the roast.
In Episode 3 it is about roasting to a certain color. We are at a roasting course with Morten Münchow from CoffeeMind. I have called the episode “Roasting by color” but Morten focuses on more than the bean color to make a good roast.
In Episode 7 roaster Kaya Caretta tell about looking at the color during the roast. Listen at http://coffeenavigated.net/podcast/episode-7/