sky-blue vs lazuline

sky-blue and lazuline both are nouns.

Word	Noun	Adjective	Verb	Adverb
sky-blue	Yes	Yes	No	No
lazuline	Yes	No	No	No

As nouns, sky-blue and lazuline are synonyms defined as:

Other synonyms of sky-blue include azure, cerulean, sapphire.

sky-blue (noun)	lazuline (noun)
a light shade of blue	a light shade of blue

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