Antonello da Messina is high in key: pale, luminous, and filled with optical air. Antonello da Messina tilts toward cool - blues and silver-greys carry the structural weight. Mid-saturation across the board: the palette has colour character without chromatic excess. #E5E6E2 claims 31.1% of the surface, functioning as the work's tonal foundation. The saturated accent, #B67A2D, registers at 7.5% - sparse enough to feel like a deliberate surprise. The full value range is 69 units: broad enough to build convincing three-dimensional form. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 1 of Antonello da Messina's sequence - a single chapter in a chromatic story told across many works.