Etienne-Prosper Berne-Bellecour occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. At 8.0%, #663F1E carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. From deepest dark to palest light, the palette traverses 59 units of the value scale - a span that creates natural depth. These proportions encode Etienne-Prosper Berne-Bellecour's instinctive sense of how much of each quality the eye can hold.