Theodore Rousseau occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Theodore Rousseau tilts toward cool - blues and silver-greys carry the structural weight. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. The highest-chroma note - #2C130A - appears at just 4.4%, deployed as a precision accent against the quieter ground. A value spread of 63 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Palette 12 sits within the larger chromatic argument that Theodore Rousseau's complete body of work advances.