colouration vs color

colouration and color both are nouns.

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

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

colouration: appearance with regard to color
color: a visual attribute of things that results from the light they emit or transmit or reflect

Other hypernyms of colouration include coloring, colour, colouring.

As nouns, colouration and color are synonyms defined as:

Other synonyms of colouration include coloration, colour.

colouration (noun)	color (noun)
choice and use of colors (as by an artist)	a visual attribute of things that results from the light they emit or transmit or reflect
appearance with regard to color	the appearance of objects (or light sources) described in terms of a person's perception of their hue and lightness (or brightness) and saturation
the timbre of a musical sound	the timbre of a musical sound
	interest and variety and intensity
	an outward or token appearance or form that is deliberately misleading
	(physics) the characteristic of quarks that determines their role in the strong interaction
	any material used for its color

colouration (adjective)	color (adjective)
	having or capable of producing colors

colouration (verb)	color (verb)
	add color to
	change color, often in an undesired manner
	affect as in thought or feeling
	give a deceptive explanation or excuse for
	decorate with colors
	modify or bias