Louis Artan sits in the centre of the value range, lending the palette a sense of even, sustained light. Louis Artan builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #B69F6A functions as the palette's exclamation mark: highest chroma, lowest percentage (7.5%). At 59 units of value range, the palette has the tonal breadth to sustain complex spatial readings. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. These proportions encode Louis Artan's instinctive sense of how much of each quality the eye can hold.