Mid-key values give Jacoba van Heemskerck its characteristic quietness - nothing blazes, nothing disappears. Jacoba van Heemskerck keeps warm and cool in parity, a balance that lends the work a perceptual shimmer. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The dominant colour, #1E1C1C, takes 42.7% of the total area, establishing the overall mood before any other hue is introduced. The highest-chroma note - #333EA5 - appears at just 7.4%, deployed as a precision accent against the quieter ground. 51 units of value spread create a palette that is varied but unified - contrast in the service of harmony. In the context of Jacoba van Heemskerck's full range of palettes, group 5 represents one movement in an ongoing chromatic dialogue.