Jean-François Bosio sits in the centre of the value range, lending the palette a sense of even, sustained light. Jean-François Bosio builds on cool foundations: the palette favours the blue-cyan-green arc. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. Only 8.1% is devoted to #AB843C, yet that small allocation delivers the palette's entire chromatic tension. A value spread of 58 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. This is palette 1 of Jean-François Bosio's sequence - a single chapter in a chromatic story told across many works.