orange yellow vs ocher

orange yellow and ocher both are nouns.

Word	Noun	Adjective	Verb	Adverb
orange yellow	Yes	No	No	No
ocher	Yes	Yes	No	No

As nouns, ocher is a hyponym of orange yellow; that is, ocher is a word with a more specific, narrower meaning than orange yellow:

Other hyponyms of orange yellow include ochre.

orange yellow (noun)	ocher (noun)
a shade of yellow tinged with orange	a moderate yellow-orange to orange color
	any of various earths containing silica and alumina and ferric oxide; used as a pigment

orange yellow (adjective)	ocher (adjective)
	of a moderate orange-yellow color