Mid-key values give Boris Kustodiev its characteristic quietness - nothing blazes, nothing disappears. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Chroma is held at a comfortable level - distinct colours, but no single hue is allowed to overwhelm. The chromatic peak belongs to #ADA33E, and at 18.6% it dominates, not decorates. 59 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. Palette 13 sits within the larger chromatic argument that Boris Kustodiev's complete body of work advances.