Olga Rozanova sits in the centre of the value range, lending the palette a sense of even, sustained light. Olga Rozanova tilts toward cool - blues and silver-greys carry the structural weight. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. Only 6.1% is devoted to #374F70, yet that small allocation delivers the palette's entire chromatic tension. At 52 units across the value scale, the palette keeps contrast readable without letting it dominate. 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 Olga Rozanova's complete body of work advances.