slatey vs slate-grey

slatey and slate-grey both are adjectives.

Word	Noun	Adjective	Verb	Adverb
slatey	No	Yes	No	No
slate-grey	No	Yes	No	No

As adjectives, slatey and slate-grey are synonyms defined as:

Other synonyms of slatey include slate-gray, slaty-gray, slaty-grey, slaty, stone-gray, stone-grey.

slatey (adjective)	slate-grey (adjective)
of the color of slate or granite	of the color of slate or granite