Thomas Allom is high-key - luminous, open, and weighted toward light. 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 dominant colour, #E1D5B2, takes 25.5% of the total area, establishing the overall mood before any other hue is introduced. #D1A767 functions as the palette's exclamation mark: highest chroma, lowest percentage (6.0%). 47 units of value spread create a palette that is varied but unified - contrast in the service of harmony. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. In the context of Thomas Allom's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.