Which preposition to use with discoloration

of Occurrences 13%

[Footnote 9: The White River very probably flows over volcanic deposits as its sediments would indicate; no doubt this would account for the discoloration of its waters.

about Occurrences 1%

When she testified to the blows which (in her dream) she saw her father and the prisoner exchange, and the battered appearance of Mr. Wilkeson's face, the coroner looked at the prisoner, and was evidently disappointed to observe no traces of a bruise upon his pale brow or cheeks, nor the lightest discoloration about his eyes.

due Occurrences 1%

It is more or less painful, followed by discoloration due to the escape of blood under the skin, which often may not be torn through.

in Occurrences 1%

" Arthur passed, though he noted, the unconscious superciliousness in this tribute; he felt that it was a genuine tribute, that, for all its discoloration in its passage through the tainted outer part of Ross's nature, it had come from the unspoiled, untainted, deepest part.

on Occurrences 1%

He put his most vital question first: "In all this interview with your sister, did you remark any discoloration on her throat?" The witness's lips opened; surprise spoke from her every feature.

Which preposition to use with  discoloration