The value structure of Antonello da Messina is mid-key: quiet, controlled, and cohesive. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. #7B5646 functions as the palette's exclamation mark: highest chroma, lowest percentage (7.1%). At 53 units across the value scale, the palette keeps contrast readable without letting it dominate. This is palette 4 of Antonello da Messina's sequence - a single chapter in a chromatic story told across many works.