Giulio Cesare Procaccini is built on dark foundations, with values clustered toward shadow. Warm hues command this palette; Giulio Cesare Procaccini favours the reds, oranges, and yellows of firelight and earth. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. 49.8% of the palette belongs to #1E1B19, a concentration that makes it the unmistakable visual centre. At 1.4%, #723B1B carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. At 63 units of value range, the palette has the tonal breadth to sustain complex spatial readings. This tonal restraint is characteristic of the Giulio Cesare Procaccini approach: colour serves light, not the reverse. This is palette 4 of Giulio Cesare Procaccini's sequence - a single chapter in a chromatic story told across many works.