Keisai Eisen distributes its values across the middle register, creating harmony without high contrast. Cool tones set the register here - the blues and greens easily outweigh any warm accents. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. #3F84AE functions as the palette's exclamation mark: highest chroma, lowest percentage (10.7%). 50 units of value spread create a palette that is varied but unified - contrast in the service of harmony. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Palette 9 sits within the larger chromatic argument that Keisai Eisen's complete body of work advances.