Mid-key values give James Webb its characteristic quietness - nothing blazes, nothing disappears. James Webb 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. Only 3.0% is devoted to #CDB369, yet that small allocation delivers the palette's entire chromatic tension. At 57 units of value range, the palette has the tonal breadth to sustain complex spatial readings. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. This is the light James Webb preferred, made measurable.