vividness vs colorful

vividness is a noun but colorful is not a noun.

Word	Noun	Adjective	Verb	Adverb
vividness	Yes	No	No	No
colorful	No	Yes	No	No

vividness (noun)	colorful (noun)
chromatic purity: freedom from dilution with white and hence vivid in hue
interest and variety and intensity

vividness (adjective)	colorful (adjective)
	having much or varied color
	having color or a certain color; sometimes used in combination
	striking in variety and interest