The value structure of Charles Bertrand d' Entraygues is mid-key: quiet, controlled, and cohesive. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #9F3F30 delivers the chromatic peak at only 3.6% - a small shot of colour with outsized visual impact. Spanning 48 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. Palette 4 sits within the larger chromatic argument that Charles Bertrand d' Entraygues's complete body of work advances.