Low-key values are the structural spine of Luca Giordano, giving it gravity and atmosphere. Yellow, ochre, sienna: warm hues that Luca Giordano deploys as the palette's primary energy. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #30281F at 28.8% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. The saturated accent, #AA8449, registers at 2.2% - sparse enough to feel like a deliberate surprise. At 53 units across the value scale, the palette keeps contrast readable without letting it dominate. Together these qualities place Luca Giordano firmly in the tonal tradition - concerned with mood and atmosphere rather than chromatic display. This is palette 15 of Luca Giordano's sequence - a single chapter in a chromatic story told across many works.