Mid-key values give James McNeill Whistler its characteristic quietness - nothing blazes, nothing disappears. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. A restrained, mid-chroma palette: every hue is present and legible, but nothing shouts. #E6C25A functions as the palette's exclamation mark: highest chroma, lowest percentage (2.5%). Spanning 53 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 12 sits within the larger chromatic argument that James McNeill Whistler's complete body of work advances.