The value structure of David Roberts is mid-key: quiet, controlled, and cohesive. Temperature reads distinctly warm: the reds and earth tones from David Roberts carry the compositional weight. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The most saturated colour, #9F673C, is reserved to 6.4% of the surface, where it acts as a focal punctuation. The full value range is 63 units: broad enough to build convincing three-dimensional form. In the context of David Roberts's full range of palettes, group 6 represents one movement in an ongoing chromatic dialogue.