J. E. H. MacDonald distributes its values across the middle register, creating harmony without high contrast. J. E. H. MacDonald builds on cool foundations: the palette favours the blue-cyan-green arc. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The highest-chroma note - #B6663A - appears at just 8.1%, deployed as a precision accent against the quieter ground. The value range of 45 units sits in the comfortable middle: enough depth, enough light, neither extreme. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is the light J. E. H. MacDonald preferred, made measurable.