The value structure of William Morris is mid-key: quiet, controlled, and cohesive. William Morris builds on cool foundations: the palette favours the blue-cyan-green arc. All colours lean toward grey, building depth through value rather than colour punch. The most saturated colour, #1F2D3B, is reserved to 10.0% of the surface, where it acts as a focal punctuation. From deepest dark to palest light, the palette traverses 55 units of the value scale - a span that creates natural depth. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 6 of William Morris's sequence - a single chapter in a chromatic story told across many works.