Thomas Somerscales is strongly light-biased - shadow is suggested rather than declared. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. Only 3.5% is devoted to #614934, yet that small allocation delivers the palette's entire chromatic tension. 61 units of value range underpin the palette's structural clarity: the eye always knows where light falls. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. In the context of Thomas Somerscales's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.