Mid-key values give Frantisek Kupka its characteristic quietness - nothing blazes, nothing disappears. Yellow, ochre, sienna: warm hues that Frantisek Kupka deploys as the palette's primary energy. Mid-saturation across the board: the palette has colour character without chromatic excess. The saturated accent, #C8511A, registers at 8.9% - sparse enough to feel like a deliberate surprise. 64 units of value range underpin the palette's structural clarity: the eye always knows where light falls. This is palette 6 of Frantisek Kupka's sequence - a single chapter in a chromatic story told across many works.