colourful vs polychromatic

colourful and polychromatic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
colourful	No	Yes	No	No
polychromatic	No	Yes	No	No

colourful (adjective)	polychromatic (adjective)
having much or varied color	(of light or other electromagnetic radiation) composed of more than one wavelength
striking in variety and interest	having or exhibiting many colors
having color or a certain color; sometimes used in combination