chestnut-coloured vs coloured

chestnut-coloured is not a noun while coloured is a noun.

Word	Noun	Adjective	Verb	Adverb
chestnut-coloured	No	Yes	No	No
coloured	Yes	Yes	No	No

chestnut-coloured (noun)	coloured (noun)
	a United States term for Blacks that is now considered offensive

chestnut-coloured (adjective)	coloured (adjective)
having the brown color of chestnuts	having color or a certain color; sometimes used in combination
	(used of color) artificially produced; not natural
	having skin rich in melanin pigments;
	favoring one person or side over another