spectral colour vs pink

spectral colour and pink both are nouns.

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

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

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

spectral colour (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