colour vs tint

colour and tint both are nouns.

Word	Noun	Adjective	Verb	Adverb
colour	Yes	Yes	Yes	No
tint	Yes	No	Yes	No

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

colour: a visual attribute of things that results from the light they emit or transmit or reflect
tint: a quality of a given color that differs slightly from another color

As verbs, tint is a hyponym of colour; that is, tint is a word with a more specific, narrower meaning than colour:

colour (noun)	tint (noun)
a visual attribute of things that results from the light they emit or transmit or reflect	a quality of a given color that differs slightly from another 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	a just detectable amount
the timbre of a musical sound	a dye for coloring the hair
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

colour (adjective)	tint (adjective)
having or capable of producing colors

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