Mid-key values give self-portrait its characteristic quietness - nothing blazes, nothing disappears. Built on cool foundations: the palette favours the blue-cyan-green arc. Chroma is moderate: colours carry enough saturation to be read as colour, but the palette stops well short of garish intensity. #211509 claims 26.6% of the surface, functioning as the work's tonal foundation. #85431F is not a small accent - at 1.7% it qualifies as a major presence and gives the palette its chromatic identity. A value spread of 64 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky.