Charles Sheeler distributes its values across the middle register, creating harmony without high contrast. 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. Only 11.9% is devoted to #41301D, yet that small allocation delivers the palette's entire chromatic tension. At 67 units of value range, the palette has the tonal breadth to sustain complex spatial readings. In the context of Charles Sheeler's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.