Values in Gustave-Claude-Etienne Courtois rest in the mid-range - neither dramatically lit nor steeped in shadow. Gustave-Claude-Etienne Courtois tilts toward cool - blues and silver-greys carry the structural weight. All colours lean toward grey, building depth through value rather than colour punch. The highest-chroma note - #EFE0CB - appears at just 7.6%, deployed as a precision accent against the quieter ground. A value spread of 65 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. 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 palette 2 of Gustave-Claude-Etienne Courtois's sequence - a single chapter in a chromatic story told across many works.