John Singer Sargent distributes its values across the middle register, creating harmony without high contrast. Temperature is cool-dominant, with blue and green families claiming the largest areas. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. #EFEDE1 at 25.2% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. #DDCCA4 functions as the palette's exclamation mark: highest chroma, lowest percentage (5.6%). From deepest dark to palest light, the palette traverses 72 units of the value scale - a span that creates natural depth. 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 John Singer Sargent's complete body of work advances.