My fave purple lipglosses are:
Opal Lustreglass
Veneer Lacquer
With Opal Lustreglass which is a light lavender gloss, go heavy on the eyes with loads of purple, a look like this would be great:
Untitled paint all over lid, Violet Underground on lashline, Pink Freeze on middle of upper lid, blended with Phloof on outer upper lid, Parfait Amour blended in crease & out to create a sort of cat-eye (for definition), Creme de Violet on top of Parfait Amour, Swimming on lid, from lash line to crease and blended outward.
Graphito Paint on lid, Beauty Marked on top of Graphito, Trax in crease, Pink Opal Pigment to highlight, Blacktrack Fluidline.
with a lipgloss like Veneer Lacquer:
a simple look like this would be perfect
Trax lash line to crease, Beauty Marked to line (wet on lower and upper lash line.)