multicolor vs colourful

multicolor and colourful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
multicolor	No	Yes	No	No
colourful	No	Yes	No	No

multicolor (adjective)	colourful (adjective)
having sections or patches colored differently and usually brightly	having much or varied color
	striking in variety and interest
	having color or a certain color; sometimes used in combination