nonsolid color vs colouring

nonsolid color and colouring both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonsolid color	Yes	No	No	No
colouring	Yes	No	No	No

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

nonsolid color: a color produced by a pattern of differently colored dots that together simulate the desired color
colouring: a visual attribute of things that results from the light they emit or transmit or reflect

Other hypernyms of nonsolid color include color, coloring, colour.

nonsolid color (noun)	colouring (noun)
a color produced by a pattern of differently colored dots that together simulate the desired color	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