Blue
Blue noun - The expanse of air surrounding the earth.
Royal blue and blue are semantically related. In some cases you can use "Royal blue" instead an adjective "Blue".
Royal blue
Royal blue noun - A shade of blue tinged with purple.
Show all Definitions
Synonyms for Royal blue
Blue and royal blue are semantically related. Sometimes you can use "Blue" instead a noun phrase "Royal blue".
Cite this Source
Royal blue and Blue. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/blue/royal_blue
Blue & Royal blue. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/blue/royal_blue>.
Royal blue or Blue. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/blue/royal_blue.
Google Ngram Viewer shows how "blue" and "royal blue" have occurred on timeline