My MIL is getting remarried next month and the bridal party are her 2 adult children (1 boy, 1 girl) and her FI's 2 adult children (2 girls). My SIL suggested I wear purple to match my FI who is in the bridal party. She said that all the girls in the bridal party are having their SO wear purple in their suits to match. I've always felt that wearing the same color dress as the bridesmaids was a no no in weddings. I even brought this up to the bride to see how she reacted and she said it's fine if i want to wear purple. But I feel like she wouldn't tell me if she didn't want me to. If I do wear purple I'd want it to be a different shade because i don't want to match exactly since I'm not in the bridal party. So is it improper etiquette to wear the same color dress as the bridal party or do you think it's okay?