John Graham-Gilbert occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. The palette achieves thermal balance - reds and blues, ochres and greens, each holding the other in check. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The saturated accent, #93661A, registers at 6.0% - sparse enough to feel like a deliberate surprise. At 60 units of value range, the palette has the tonal breadth to sustain complex spatial readings. In the context of John Graham-Gilbert's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.