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@rusty
Beans get darker and shinier as they progress in the roast. I think it goes:
green --> yellowish --> tan --> light brown --> brown --> dark brown --> almost black.
The shininess starts around the brown/dark brown part.
French roast is a good example of almost black and shiny. Taste gets stronger and more bitter as the roast goes on but caffeine content is reduced.
This is all based on me watching two roasting sessions a month or so ago. It might not be too accurate.