Values in Paul Trouillebert rest in the mid-range - neither dramatically lit nor steeped in shadow. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. Only 9.8% is devoted to #685137, yet that small allocation delivers the palette's entire chromatic tension. Spanning 53 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Paul Trouillebert's palette 4 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.