Joseph Anton Koch occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. At 2.7%, #5A5B25 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The full value range is 57 units: broad enough to build convincing three-dimensional form. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. This is the light Joseph Anton Koch preferred, made measurable.