Mid-key values give Willem de Poorter its characteristic quietness - nothing blazes, nothing disappears. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. 29.9% of the palette belongs to #3A331E, a concentration that makes it the unmistakable visual centre. The highest-chroma note - #5D3820 - appears at just 2.4%, deployed as a precision accent against the quieter ground. A value spread of 65 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. Willem de Poorter's palette 1 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.