The value structure of Andreas Achenbach is mid-key: quiet, controlled, and cohesive. Andreas Achenbach tilts toward cool - blues and silver-greys carry the structural weight. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The most saturated colour, #8F783B, is reserved to 6.8% of the surface, where it acts as a focal punctuation. Spanning 53 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. This is palette 10 of Andreas Achenbach's sequence - a single chapter in a chromatic story told across many works.