Thomas Girtin keeps values measured and balanced, a hallmark of tonal restraint. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. #644930 functions as the palette's exclamation mark: highest chroma, lowest percentage (11.8%). The value range spans 57 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. These proportions encode Thomas Girtin's instinctive sense of how much of each quality the eye can hold.