John Souch is low-key throughout, a quality associated with Tenebrous Sienna - deep shadows dominate the composition. John Souch builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The most saturated colour, #734F33, is reserved to 4.4% of the surface, where it acts as a focal punctuation. Spanning 53 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. John Souch's palette 3 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.