Gustave-Claude-Etienne Courtois distributes its values across the middle register, creating harmony without high contrast. Neither warm nor cool has the upper hand here; the equilibrium between the two generates the palette's visual energy. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The dominant colour, #19191C, takes 26.2% of the total area, establishing the overall mood before any other hue is introduced. #F4EAE3 functions as the palette's exclamation mark: highest chroma, lowest percentage (2.8%). A value spread of 73 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. In the context of Gustave-Claude-Etienne Courtois's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.