Just so you're thinking about it - everyone will see your shoes when you do the garter toss.

I'd say it's definitely a battle not worth fighting - especially if your mother is going to be a stickler on it. I don't know that I'd call it tacky, per se, but it's probably just not worth fighting over.

Maybe you could find a simple white shoe and add a blue ribbon or bow that would help you accomplish all of the above.