John William Waterhouse distributes its values across the middle register, creating harmony without high contrast. John William Waterhouse 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 dominant colour, #19171A, takes 33.8% of the total area, establishing the overall mood before any other hue is introduced. Only 3.6% is devoted to #DBC7AB, yet that small allocation delivers the palette's entire chromatic tension. 63 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. In the context of John William Waterhouse's full range of palettes, group 12 represents one movement in an ongoing chromatic dialogue.