Mid-key values give Oswald Achenbach its characteristic quietness - nothing blazes, nothing disappears. Oswald Achenbach builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. At 7.1%, #6A5038 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The value range spans 55 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. Oswald Achenbach's palette 3 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.