Mid-key values give Ernst Stuckelberg its characteristic quietness - nothing blazes, nothing disappears. Warmth dominates - the palette of Ernst Stuckelberg leans heavily on the yellow-orange-red arc of the colour wheel. Saturation is measured and controlled, giving the palette presence without visual aggression. The saturated accent, #C2751C, registers at 7.7% - sparse enough to feel like a deliberate surprise. At 65 units of value range, the palette has the tonal breadth to sustain complex spatial readings. This is palette 3 of Ernst Stuckelberg's sequence - a single chapter in a chromatic story told across many works.