colouration vs selection

colouration and selection both are nouns.

Word	Noun	Adjective	Verb	Adverb
colouration	Yes	No	No	No
selection	Yes	No	No	No

As nouns, selection is a hypernym of colouration; that is, selection is a word with a broader meaning than colouration:

Other hypernyms of colouration include choice, option, pick.

colouration (noun)	selection (noun)
choice and use of colors (as by an artist)	the act of choosing or selecting
appearance with regard to color	the person or thing chosen or selected
the timbre of a musical sound	a passage selected from a larger work
	an assortment of things from which a choice can be made
	a natural process resulting in the evolution of organisms best adapted to the environment