Black and blue Roman figures (5)

I believe the answer is:

livid

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'black and blue' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for livid that I've seen before include "Apoplectic" , "Bluish-grey" , "Lead-coloured, being furiously angry" , "Angry; marked with bruise" , "Black-and-blue - furious" .)

I've seen this clue in The Globe and Mail.

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