The high-key values of William Coulter give it an effulgent, almost bleached quality. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. William Coulter gives 28.6% of the composition to a single #FFFFFF - a decisive chromatic anchor. #71503B delivers the chromatic peak at only 0.9% - a small shot of colour with outsized visual impact. The full value range is 70 units: broad enough to build convincing three-dimensional form. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. William Coulter's palette 2 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.