in the "sales contract" screen I wanted If the status field is "Completed" and the remainder to be invoiced is different from 0 then all the text in the item line must appear in red. how to do it?

in the "sales contract" screen I wanted If the status field is "Completed" and the remainder to be invoiced is different from 0 then all the text in the item line must appear in red. how to do it?
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