Joan Blaeu is strongly light-biased - shadow is suggested rather than declared. Joan Blaeu 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. The saturated accent, #895039, registers at 5.1% - sparse enough to feel like a deliberate surprise. The value range of 53 units sits in the comfortable middle: enough depth, enough light, neither extreme. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 2 sits within the larger chromatic argument that Joan Blaeu's complete body of work advances.