Crossword Genius

Make refreshingly colourful (5)

Ross

I believe the answer is:

redye

I'm a little stuck... Click here to teach me more about this clue!

'make refreshingly' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'colourful' is the wordplay.
I cannot really understand how this works, but
'colourful' could be 'red' (similar in meaning) and 'red' is found within the answer.
The remaining letters 'ye' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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