Oswald Achenbach is built on dark foundations, with values clustered toward shadow. Temperature reads distinctly warm: the reds and earth tones from Oswald Achenbach carry the compositional weight. All colours lean toward grey, building depth through value rather than colour punch. #161111 claims 31.3% of the surface, functioning as the work's tonal foundation. #785830 functions as the palette's exclamation mark: highest chroma, lowest percentage (8.0%). From deepest dark to palest light, the palette traverses 66 units of the value scale - a span that creates natural depth. Together these qualities place Oswald Achenbach firmly in the tonal tradition - concerned with mood and atmosphere rather than chromatic display. This is palette 9 of Oswald Achenbach's sequence - a single chapter in a chromatic story told across many works.