Hubert Robert distributes its values across the middle register, creating harmony without high contrast. Hubert Robert tilts toward cool - blues and silver-greys carry the structural weight. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. #816329 functions as the palette's exclamation mark: highest chroma, lowest percentage (6.7%). A value spread of 67 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Hubert Robert's palette 6 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.