Hugo van der Goes occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Yellow, ochre, sienna: warm hues that Hugo van der Goes deploys as the palette's primary energy. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The saturated accent, #DCBA67, registers at 2.7% - sparse enough to feel like a deliberate surprise. The full value range is 60 units: broad enough to build convincing three-dimensional form. Taken together, these qualities constitute Hugo van der Goes's chromatic voice - distinctive enough to be read across an entire body of work.