The value structure of Hilma af Klint is mid-key: quiet, controlled, and cohesive. Hilma af Klint tilts toward cool - blues and silver-greys carry the structural weight. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The highest-chroma note - #C7AB54 - appears at just 1.8%, deployed as a precision accent against the quieter ground. 69 units of value range underpin the palette's structural clarity: the eye always knows where light falls. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. This is palette 4 of Hilma af Klint's sequence - a single chapter in a chromatic story told across many works.