Mid-key values give Louis Abel-Truchet its characteristic quietness - nothing blazes, nothing disappears. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. Only 11.2% is devoted to #DDDCBF, yet that small allocation delivers the palette's entire chromatic tension. 64 units of value range underpin the palette's structural clarity: the eye always knows where light falls. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Palette 1 sits within the larger chromatic argument that Louis Abel-Truchet's complete body of work advances.