colour vs mottle

colour and mottle both are nouns.

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

As nouns, mottle is a hyponym of colour; that is, mottle 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
mottle: an irregular arrangement of patches of color

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

colour: add color to
mottle: mark with spots or blotches of different color or shades of color as if stained

colour (noun)	mottle (noun)
a visual attribute of things that results from the light they emit or transmit or reflect	an irregular arrangement of patches of 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
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)	mottle (adjective)
having or capable of producing colors

colour (verb)	mottle (verb)
change color, often in an undesired manner	colour with streaks or blotches of different shades
add color to	mark with spots or blotches of different color or shades of color as if stained
affect as in thought or feeling
give a deceptive explanation or excuse for
decorate with colors
modify or bias