The palette of Richard Jack sits in the lower register of the value scale - dense, contained, and weighted. Cool tones set the register here - the blues and greens easily outweigh any warm accents. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The most saturated colour, #A67745, is reserved to 3.2% of the surface, where it acts as a focal punctuation. From deepest dark to palest light, the palette traverses 72 units of the value scale - a span that creates natural depth. This tonal restraint is characteristic of the Richard Jack approach: colour serves light, not the reverse. In the context of Richard Jack's full range of palettes, group 6 represents one movement in an ongoing chromatic dialogue.