my idea of a perfect sweater-weather nail polish is tasha, one of picture polish collaboration shades from 2017.
tasha is described as "lilac grey holographic nail polish with holo flakes" created with sonia from bad girl nails, as a tribute to her puppy. and it is a puppy-like fluffy shade, a pale lavender with flakie-type of shimmer that i adore. it is very pretty.
i used base (china glaze strong adhesion) + two layers of polish + top coat (essence btgnts).