John Henry Twachtman is high in key: pale, luminous, and filled with optical air. John Henry Twachtman builds on cool foundations: the palette favours the blue-cyan-green arc. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. #707F3F functions as the palette's exclamation mark: highest chroma, lowest percentage (5.8%). From deepest dark to palest light, the palette traverses 57 units of the value scale - a span that creates natural depth. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Palette 1 sits within the larger chromatic argument that John Henry Twachtman's complete body of work advances.