viridity vs spectral colour

viridity and spectral colour both are nouns.

Word	Noun	Adjective	Verb	Adverb
viridity	Yes	No	No	No
spectral colour	Yes	No	No	No

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

Other hypernyms of viridity include chromatic color, chromatic colour, spectral color.

viridity (noun)	spectral colour (noun)
green color or pigment; resembling the color of growing grass	a color that has hue