quadratura distributes its values across the middle register, creating harmony without high contrast. The dominant temperature is warm, with earth tones and fire-hues setting the emotional key. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. At 8.4%, #643F2F carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. A value spread of 60 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light.