selection vs coloration

selection and coloration both are nouns.

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

As nouns, coloration is a hyponym of selection; that is, coloration is a word with a more specific, narrower meaning than selection:

selection (noun)	coloration (noun)
the act of choosing or selecting	choice and use of colors (as by an artist)
the person or thing chosen or selected	appearance with regard to color
a passage selected from a larger work	the timbre of a musical sound
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