intransitive. Of fruit, leaves, hair, etc.: to change colour, become a different colour. Cf. earlier to turn colour at phrases 1e.

intransitive. To play the chameleon; to change colour like a chameleon.

to turn (†one's) colour: to change colour, become a different colour; (of a person) to become pale or red in the face (now rare).

intransitive. To become pale or discoloured; to lose or change colour. Also figurative and in figurative contexts.

intransitive. To take on colour, become coloured; to change colour; spec. (of fruit, esp. grapes) to attain the colour associated with ripeness.

Of a colour: To move, be affected.