Do the MOB & MOG dresses have to match? Also, should they get something coordinating with our wedding colors? Our colors are light pink and gray. MY FI mom is kinda old fashioned and asked what my mom was wanting to wear. All I know is my mom wants to wear something knee length so I told FMIL that. Also, I have been to some wedding where the moms were wearing cute black dresses and I kinda liked that. Any idea on this? I am kinda stumped as to what the rules are on this or if anyone even follows any. Thanks ladies!