Jehan Georges Vibert is high-key - luminous, open, and weighted toward light. The palette achieves thermal balance - reds and blues, ochres and greens, each holding the other in check. Mid-saturation across the board: the palette has colour character without chromatic excess. Only 4.9% is devoted to #E25326, yet that small allocation delivers the palette's entire chromatic tension. From deepest dark to palest light, the palette traverses 55 units of the value scale - a span that creates natural depth. The combination of mid-to-high key, balanced temperature, and elevated chroma is characteristic of Impressionist observation: light broken into its component hues. This is palette 1 of Jehan Georges Vibert's sequence - a single chapter in a chromatic story told across many works.