Peter Paul Rubens sits in the centre of the value range, lending the palette a sense of even, sustained light. Temperature is cool-dominant, with blue and green families claiming the largest areas. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The dominant colour, #1C1B15, takes 27.9% of the total area, establishing the overall mood before any other hue is introduced. The highest-chroma note - #A6794D - appears at just 6.8%, deployed as a precision accent against the quieter ground. The full value range is 57 units: broad enough to build convincing three-dimensional form. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Peter Paul Rubens's palette 23 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.