Mid-key values give John Martin its characteristic quietness - nothing blazes, nothing disappears. John Martin balances warm and cool with remarkable evenness, giving the composition its characteristic vibrancy. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The highest-chroma note - #613821 - appears at just 10.1%, deployed as a precision accent against the quieter ground. 60 units of value range underpin the palette's structural clarity: the eye always knows where light falls. These proportions encode John Martin's instinctive sense of how much of each quality the eye can hold.