blueness vs spectral color

blueness and spectral color both are nouns.

Word	Noun	Adjective	Verb	Adverb
blueness	Yes	No	No	No
spectral color	Yes	No	No	No

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

blueness: blue color or pigment; resembling the color of the clear sky in the daytime
spectral color: a color that has hue

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

blueness (noun)	spectral color (noun)
blue color or pigment; resembling the color of the clear sky in the daytime	a color that has hue