The high-key values of John Henry Twachtman give it an effulgent, almost bleached quality. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The highest-chroma note - #957A47 - appears at just 7.9%, deployed as a precision accent against the quieter ground. The value range spans 59 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Taken together, these qualities constitute John Henry Twachtman's chromatic voice - distinctive enough to be read across an entire body of work.