Charles Martin Powell is high in key: pale, luminous, and filled with optical air. Temperature is cool-dominant, with blue and green families claiming the largest areas. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. Charles Martin Powell gives 25.6% of the composition to a single #ADACA8 - a decisive chromatic anchor. The highest-chroma note - #45382A - appears at just 3.0%, deployed as a precision accent against the quieter ground. The palette spans 47 value units: a measured range that delivers coherence over drama. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. In the context of Charles Martin Powell's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.