Cyan
Indigo
Mutual synonyms
Both words in one sentence
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Seira's is red-violet, Kii's is yellow-green, Sora flip-flops between cyan and indigo, and Maria's is apricot.
Source: Anime / Aikatsu - This can clearly be seen in the coin-op Rainbow Islands, in which the "blue" gems are cyan and the "indigo" gems are blue.
Source: Newer Than They Think - Actually, because indigo is so indistinguishable from blue and purple, it is possible that Newton's "blue" referred to cyan and his "indigo" referred to our blue, which would make more sense (other languages use a Translation Correction often enough).
Source: Newer Than They Think
Cite this Source
Indigo and Cyan. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/cyan/indigo
Cyan & Indigo. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/cyan/indigo>.
Indigo or Cyan. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/cyan/indigo.
Google Ngram Viewer shows how "cyan" and "indigo" have occurred on timeline