John Leech is high-key - luminous, open, and weighted toward light. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. The dominant colour, #F7F3CC, takes 25.7% of the total area, establishing the overall mood before any other hue is introduced. Only 12.4% is devoted to #D2BF82, yet that small allocation delivers the palette's entire chromatic tension. At 72 units of value range, the palette has the tonal breadth to sustain complex spatial readings. 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 John Leech's sequence - a single chapter in a chromatic story told across many works.