I plan to brew an English Porter using a recipe that calls for Chocolate Malt 430 SRM, but the homebrew supply only has 350 SRM. I think I can substitute the 350 SRM but at a higher percentage, giving the same beer color as in the recipe. The idea is that both color and flavors are less intense with the 350 SRM malt, and increasing the percentage will bring both close to the original beer. I don’t expect it to come out exactly the same, but hopefully it will be very close. Any ideas about this?