Zinaida Serebriakova occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The saturated accent, #A97C56, registers at 7.1% - sparse enough to feel like a deliberate surprise. The palette spans 54 value units: a measured range that delivers coherence over drama. Palette 15 sits within the larger chromatic argument that Zinaida Serebriakova's complete body of work advances.