Thomas Pollock Anshutz is high in key: pale, luminous, and filled with optical air. Thomas Pollock Anshutz builds on cool foundations: the palette favours the blue-cyan-green arc. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. The chromatic peak belongs to #9A775B, and at 8.4% it dominates, not decorates. 66 units of value range underpin the palette's structural clarity: the eye always knows where light falls. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. This is palette 4 of Thomas Pollock Anshutz's sequence - a single chapter in a chromatic story told across many works.