This is an Indo-Western outfit consisting of three pieces:
A purple and tealblue crop top with a sweetheart neckline.
A long, flowing, purple skirt.
An embroidered, full-sleeve, open jacket worn over the top.
The outfit is available from several retailers and can be found by searching for terms like "purple crop top and skirt with embroidered jacket" or "Indo Western crop top jacket with skirt". It is described as suitable for festive occasions and weddings.
