yellowish-orange vs yellow-orange

yellowish-orange and yellow-orange both are adjectives.

Word	Noun	Adjective	Verb	Adverb
yellowish-orange	No	Yes	No	No
yellow-orange	No	Yes	No	No

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

yellowish-orange (adjective)	yellow-orange (adjective)
of orange tinged with yellow	of orange tinged with yellow