The value structure of Hugues Merle is mid-key: quiet, controlled, and cohesive. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The highest-chroma note - #6F2A1E - appears at just 4.6%, deployed as a precision accent against the quieter ground. 65 units of value range underpin the palette's structural clarity: the eye always knows where light falls. This is the light Hugues Merle preferred, made measurable.