self-portrait 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. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The saturated accent, #89673C, registers at 8.6% - sparse enough to feel like a deliberate surprise. From deepest dark to palest light, the palette traverses 64 units of the value scale - a span that creates natural depth.