Values in Gilbert Jackson rest in the mid-range - neither dramatically lit nor steeped in shadow. Yellow, ochre, sienna: warm hues that Gilbert Jackson deploys as the palette's primary energy. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. At 29.3%, #1E1917 functions less as a colour accent and more as a complete atmospheric environment. At 7.3%, #A53B1E carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The value range spans 59 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. This is the light Gilbert Jackson preferred, made measurable.