Indigo
Both words in one sentence
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This could also be the trait of a particularly anal-retentive character who always has to be right, the trait extending so far that the character always has to use exactly the right word — never using "blue" when "azure" or "indigo" or even "royal blue" would be more accurate, for example.
Source: Sesquipedalian Loquaciousness
Cite this Source
Royal and Indigo. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/indigo/royal
Indigo & Royal. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/indigo/royal>.
Royal or Indigo. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/indigo/royal.
Google Ngram Viewer shows how "indigo" and "royal" have occurred on timeline