yellow-grey vs yellowish-gray

yellow-grey and yellowish-gray both are adjectives.

Word	Noun	Adjective	Verb	Adverb
yellow-grey	No	Yes	No	No
yellowish-gray	No	Yes	No	No

As adjectives, yellow-grey and yellowish-gray are synonyms defined as:

Other synonyms of yellow-grey include yellow-gray, yellowish-grey.

yellow-grey (adjective)	yellowish-gray (adjective)
of grey tinged with yellow	of grey tinged with yellow