spectral colour vs British spelling

spectral colour and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
spectral colour	Yes	No	No	No
British spelling	Yes	No	No	No

spectral colour (noun)	British spelling (noun)
a color that has hue	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')