Colour given by me to painting (12)

I believe the answer is:

pigmentation

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

'colour' is the definition.
(pigmentation is a kind of colour)

'by me to painting' is the wordplay.
'me to painting' can be anagrammed to 'PIGMENTATION'.
But, I am not sure how the anagram is indicated.

'given' acts as a link.

Can you help me to learn more?

(Other definitions for pigmentation that I've seen before include "For example, madder" , "Natural colouring" .)

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