Indigo
Sky
Sky noun - The expanse of air surrounding the earth.
Both words in one sentence
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In My Little Pony: Equestria Girls Rainbow Rocks, after the Dazzlings summon their siren avatars, the sky goes from indigo to a much more threatening red.
Source: Red Sky, Take Warning -
Ditto to their allies, the Terran Dominion and the Kerrigan-controlled Swarm are sky blue and indigo respectively.
Source: Blue Is Heroic -
Red is storm, orange is sky, yellow is sun, green is lightning, blue is rain, indigo is mist, and violet is cloud.
Source: Rainbow Motif
Cite this Source
Sky and Indigo. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/indigo/sky
Indigo & Sky. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/indigo/sky>.
Sky or Indigo. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/indigo/sky.
Google Ngram Viewer shows how "indigo" and "sky" have occurred on timeline