Mid-key values give Giovanni Battista Piranesi its characteristic quietness - nothing blazes, nothing disappears. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. Rather than a studied accent, #212719 takes 12.1% - a bold allocation that saturates the composition's atmosphere. The full value range is 62 units: broad enough to build convincing three-dimensional form. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. The palette is recognisably Giovanni Battista Piranesi's own: particular in its temperature, chroma, and the economy of its brightest note.