Jan Willem van Borselen distributes its values across the middle register, creating harmony without high contrast. Jan Willem van Borselen 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. At 8.0%, #BAA159 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. 58 units of value range underpin the palette's structural clarity: the eye always knows where light falls. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. This is the light Jan Willem van Borselen preferred, made measurable.