What color corresponds to an SRM of 18?

An SRM (Standard Reference Method) of 18 corresponds to a color that is generally described as amber brown. The SRM scale measures the color of beer, with higher numbers indicating darker colors. An SRM of 18 typically shows that the beer exhibits a deep, rich amber hue with brownish undertones, which is characteristic of many styles such as certain amber ales or brown ales.

Pale amber, golden, and deep amber are colors associated with lower SRM values, which do not fit the deeper color profile associated with an SRM of 18. Deep amber does approach that range, but it often describes a lighter amber shade than what is indicated at this higher SRM. Hence, amber brown is the most accurate descriptor for an SRM of 18, aligning well with the visual characteristics of beers at that level of darkness.