Values in Nikolay Bogdanov-Belsky rest in the mid-range - neither dramatically lit nor steeped in shadow. Nikolay Bogdanov-Belsky builds on cool foundations: the palette favours the blue-cyan-green arc. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The most saturated colour, #5C82B0, is reserved to 13.2% of the surface, where it acts as a focal punctuation. A value spread of 55 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. 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 Nikolay Bogdanov-Belsky's complete body of work advances.