Which preposition to use with discolored

with Occurrences 6%

On the deck lay the strands of rope with which he had been secured-they had been severed by a sharp knife, the ends discolored with blood stains.

after Occurrences 1%

It is a careless habit to allow pared potatoes to fall among the skins, as in this way they become stained, and appear black and discolored after cooking.

from Occurrences 1%

A wooden bedstead, without curtains, is partly concealed behind a painted screen, covered with gods and goddesses, much consumed and discolored from the damp.

Which preposition to use with  discolored