19 (F). Going to a Christian wedding for the first time in Kochi. Need outfit recommendations that are modern and match the general Christian vibe for weddings.

19 year old girl here. I'm not a Christian and has never been to a Christian wedding either. One of my best friend's brother is getting married this coming Saturday in Kochi. Planning to wear something that is not white. I need something fancy that matches the christian vibe of weddings in general. Any ideas are appreciated and general tips too. Accessory recommendations are welcome too. Thanks.