The value structure of Francisco de Zurbaran is mid-key: quiet, controlled, and cohesive. Temperature is cool-dominant, with blue and green families claiming the largest areas. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #141719 claims 29.9% of the surface, functioning as the work's tonal foundation. The most saturated colour, #6A4C36, is reserved to 5.2% of the surface, where it acts as a focal punctuation. A value spread of 61 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Francisco de Zurbaran's palette 12 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.