off-color vs dirty

off-color and dirty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
off-color	No	Yes	No	No
dirty	No	Yes	Yes	No

off-color (adjective)	dirty (adjective)
humorously vulgar	soiled or likely to soil with dirt or grime
in violation of good taste even verging on the indecent	(of behavior or especially language) characterized by obscenity or indecency
	spreading pollution or contamination; especially radioactive contamination
	unethical or dishonest
	expressing or revealing hostility or dislike
	obtained illegally or by improper means
	(of a manuscript) defaced with changes
	(of color) discolored by impurities; not bright and clear
	vile; despicable
	contaminated with infecting organisms
	unpleasantly stormy
	violating accepted standards or rules

off-color (verb)	dirty (verb)
	make soiled, filthy, or dirty