Interesting article here about the meaning of yellow stockings -
Yellow Stockings
They did seem to be associated with unfaithfulness. It quotes a ballad of 1586, Merry Jest of John Tomson and Jakaman his wife -
For yellow love is too-too bad,
without all wit or pollicie;
And too much love hath made her mad,
and fill'd her full of jealousie.
Shee thinkes I am in love with those
I speake to, passing by;
That makes her weare the yellow hose
I gave her for to dye.
(Roxburghe, 2:14l)