The value structure of Henry Ossawa Tanner is mid-key: quiet, controlled, and cohesive. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The highest-chroma note - #C5CCD9 - appears at just 11.4%, deployed as a precision accent against the quieter ground. The value range spans 71 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 4 of Henry Ossawa Tanner's sequence - a single chapter in a chromatic story told across many works.