Paul Jacoulet works in the upper reaches of the value scale, creating an atmosphere of brightness and expansiveness. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Colours are neither washed out nor blazing; they occupy the productive middle ground of the chroma scale. At 26.3%, #FCF25C functions less as a colour accent and more as a complete atmospheric environment. The most saturated colour, #B44B52, covers 3.1% of the surface: too much to call an accent, too strong to ignore. A value spread of 75 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Paul Jacoulet's palette 13 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.