coloured person vs Black person

coloured person and Black person both are nouns.

Word	Noun	Adjective	Verb	Adverb
coloured person	Yes	No	No	No
Black person	Yes	No	No	No

As nouns, Black person is a hypernym of coloured person; that is, Black person is a word with a broader meaning than coloured person:

coloured person: a United States term for Blacks that is now considered offensive
Black person: a person with dark skin who comes from Africa (or whose ancestors came from Africa)

Other hypernyms of coloured person include African-American, Black, Negro, Negroid, blackamoor.

coloured person (noun)	Black person (noun)
a United States term for Blacks that is now considered offensive	a person with dark skin who comes from Africa (or whose ancestors came from Africa)