The value structure of Rubens Santoro is mid-key: quiet, controlled, and cohesive. The dominant temperature is warm, with earth tones and fire-hues setting the emotional key. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #C9B185 delivers the chromatic peak at only 5.9% - a small shot of colour with outsized visual impact. At 59 units of value range, the palette has the tonal breadth to sustain complex spatial readings. In the context of Rubens Santoro's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.