bright blue vs azure

bright blue is not a noun while azure is a noun.

Word	Noun	Adjective	Verb	Adverb
bright blue	No	Yes	No	No
azure	Yes	Yes	Yes	No

As adjectives, bright blue and azure are synonyms defined as:

bright blue and azure: of a deep somewhat purplish blue color similar to that of a clear October sky

Other synonyms of bright blue include cerulean, sky-blue.

bright blue (noun)	azure (noun)
	a light shade of blue

bright blue (adjective)	azure (adjective)
of a deep somewhat purplish blue color similar to that of a clear October sky	of a deep somewhat purplish blue color similar to that of a clear October sky

bright blue (verb)	azure (verb)
	color azure