The value structure of Sonia Delaunay is mid-key: quiet, controlled, and cohesive. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Mid-range chroma keeps the palette grounded - colourful but not strident. #EFA93A delivers the chromatic peak at only 8.0% - a small shot of colour with outsized visual impact. Spanning 43 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. Taken together, these qualities constitute Sonia Delaunay's chromatic voice - distinctive enough to be read across an entire body of work.