spectral color vs pink

spectral color and pink both are nouns.

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

As nouns, pink is a hyponym of spectral color; that is, pink is a word with a more specific, narrower meaning than spectral color:

spectral color (noun)	pink (noun)
a color that has hue	a light shade of red
	a person with mildly leftist political views
	any of various flowers of plants of the genus Dianthus cultivated for their fragrant flowers

spectral color (adjective)	pink (adjective)
	of a light shade of red

spectral color (verb)	pink (verb)
	cut in a zigzag pattern with pinking shears, in sewing
	make light, repeated taps on a surface
	sound like a car engine that is firing too early