salmon vs spectral colour

salmon and spectral colour both are nouns.

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

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

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

salmon (noun)	spectral colour (noun)
any of various large food and game fishes of northern waters; usually migrate from salt to fresh water to spawn	a color that has hue
a pale pinkish orange color
flesh of any of various marine or freshwater fish of the family Salmonidae

salmon (adjective)	spectral colour (adjective)
of orange tinged with pink