That's a tough one. I'm just thinking of my own wedding. I figured, I'm only going to do this once and it's going to be traditional, so like a good bride I chose some traditionally awful bridesmaid dresses. If my MIL showed up in really bright emerald green, I would have known she was trying to make a point. Was the predominant color of your wedding party distinctive?
Pastel pink. I think she did do it on purpose, not to be nasty, but believing that she was supposed to match.
Looking back at the pictures, HER mother is also wearing pink! Which just proves I'm a nasty person because Grandma in pink never bothered me a bit! LOL!