Combination 182 of 348 in Wada's six-volume 1933 work. A 3-colour grouping of Raw Sienna, Vandyke Brown, Deep Indigo, as documented in the original plates.
Historical context
Plate 182 of Wada's 348 anchors Raw Sienna, Vandyke Brown and Deep Indigo in the orange family —
a 3-colour grouping with a solemn, warm character, recorded in the Showa-era volumes of Sanzo Wada's 1933
Dictionary of Color Combinations, where these shikisai names have
sat in the public domain for generations.
Its strongest pairing — Raw Sienna on Deep Indigo — reaches a
contrast ratio of 4.84:1, meeting the WCAG AA bar for body text, so it holds up for text-on-colour layouts as well as decorative use.
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