Will be brewing a RR Row 2 Hill 56 clone within the next month. The only change I want to make is increase the color to more of a copper then golden without changing the flavor. The recipe uses C20. if I increase it to c40 (same quantity) the color goes from 5.4 SRM to 6.62. I would like to be closer to 7.5-8. Currently I am at 5.7% C40. What would be the best option to increase the color? Chocolate malt, Carafa III or something else?