The value structure of George Hemming Mason is mid-key: quiet, controlled, and cohesive. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. The most saturated colour, #30241A, is reserved to 6.0% of the surface, where it acts as a focal punctuation. Spanning 52 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. This is palette 5 of George Hemming Mason's sequence - a single chapter in a chromatic story told across many works.