Which preposition to use with brownish

on Occurrences 2%

Its color was a black body, brownish on the cheeks and under the body.

with Occurrences 2%

Nicest place that ever was seen, Colleges red and Common green, Sidewalks brownish with trees between.

in Occurrences 1%

The wood of the European elm is stronger than ours; it is hard and fine-grained, and brownish in color, and is much used in the building of ships, for hubs of wheels, axletrees and many other purposes.

Which preposition to use with  brownish