William Logsdail sits in the centre of the value range, lending the palette a sense of even, sustained light. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The highest-chroma note - #C29714 - appears at just 1.1%, deployed as a precision accent against the quieter ground. From deepest dark to palest light, the palette traverses 62 units of the value scale - a span that creates natural depth. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is the light William Logsdail preferred, made measurable.