British spelling vs colourful

British spelling is a noun but colourful is not a noun.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
colourful	No	Yes	No	No

British spelling (noun)	colourful (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')

British spelling (adjective)	colourful (adjective)
	having much or varied color
	striking in variety and interest
	having color or a certain color; sometimes used in combination