colour supplement vs mag

colour supplement and mag both are nouns.

Word	Noun	Adjective	Verb	Adverb
colour supplement	Yes	No	No	No
mag	Yes	No	No	No

As nouns, mag is a hypernym of colour supplement; that is, mag is a word with a broader meaning than colour supplement:

colour supplement: (British) a magazine that is printed in color and circulated with a newspaper (especially on weekends)
mag: a periodic publication containing pictures and stories and articles of interest to those who purchase it or subscribe to it

Other hypernyms of colour supplement include magazine.

colour supplement (noun)	mag (noun)
(British) a magazine that is printed in color and circulated with a newspaper (especially on weekends)	a periodic publication containing pictures and stories and articles of interest to those who purchase it or subscribe to it