Mid-key values give Tsukioka Yoshitoshi its characteristic quietness - nothing blazes, nothing disappears. Tsukioka Yoshitoshi builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. Only 2.3% is devoted to #9F3F32, yet that small allocation delivers the palette's entire chromatic tension. The palette spans 53 value units: a measured range that delivers coherence over drama. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 4 sits within the larger chromatic argument that Tsukioka Yoshitoshi's complete body of work advances.