Gustave Loiseau occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. At 6.0%, #856D57 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The value range of 48 units sits in the comfortable middle: enough depth, enough light, neither extreme. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Palette 13 sits within the larger chromatic argument that Gustave Loiseau's complete body of work advances.