people of colour vs British spelling

people of colour and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
people of colour	Yes	No	No	No
British spelling	Yes	No	No	No

people of colour (noun)	British spelling (noun)
a race with skin pigmentation different from the white race (especially Blacks)	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')