spectral color vs coloring

spectral color and coloring both are nouns.

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

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

spectral color: a color that has hue
coloring: a visual attribute of things that results from the light they emit or transmit or reflect

Other hypernyms of spectral color include color, colour, colouring.

spectral color (noun)	coloring (noun)
a color that has hue	the act or process of changing the color of something
	a visual attribute of things that results from the light they emit or transmit or reflect
	a digestible substance used to give color to food