Values in Giovanni Battista Piranesi rest in the mid-range - neither dramatically lit nor steeped in shadow. Cool tones set the register here - the blues and greens easily outweigh any warm accents. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. Rather than a studied accent, #212719 takes 12.1% - a bold allocation that saturates the composition's atmosphere. At 62 units of value range, the palette has the tonal breadth to sustain complex spatial readings. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. In the context of Giovanni Battista Piranesi's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.