The high-key values of William Collins give it an effulgent, almost bleached quality. William Collins builds on cool foundations: the palette favours the blue-cyan-green arc. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. The most saturated colour, #5D4921, is reserved to 8.1% of the surface, where it acts as a focal punctuation. 66 units of value range underpin the palette's structural clarity: the eye always knows where light falls. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 5 of William Collins's sequence - a single chapter in a chromatic story told across many works.