Light floods Jean-Joseph-Xavier Bidauld; the palette keeps values pale and airy across its range. Jean-Joseph-Xavier Bidauld builds on cool foundations: the palette favours the blue-cyan-green arc. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. At 1.3%, #572E0E carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. A value spread of 73 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. In the context of Jean-Joseph-Xavier Bidauld's full range of palettes, group 5 represents one movement in an ongoing chromatic dialogue.