Joan Brull is low-key throughout, a quality associated with Abyssal Sienna - deep shadows dominate the composition. Joan Brull keeps warm and cool in parity, a balance that lends the work a perceptual shimmer. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. #0E0E0E at 42.3% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. At 2.1%, #561B11 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The full value range is 57 units: broad enough to build convincing three-dimensional form. Together these qualities place Joan Brull firmly in the tonal tradition - concerned with mood and atmosphere rather than chromatic display. This is palette 12 of Joan Brull's sequence - a single chapter in a chromatic story told across many works.