vivid vs vividness

vivid is not a noun while vividness is a noun.

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

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

vivid (adjective)	vividness (adjective)
having the clarity and freshness of immediate experience
having strong or striking color
evoking lifelike images within the mind
(of color) having the highest saturation