I am having a very formal wedding. FSIL called me up asking details for the day of the wedding and what colors she should avoid. I told her not to wear white as I want to be the only one in white (ivory) on my wedding day. She was like why? I said its tradition for a guest to not wear a white dress to someone's wedding. She said she had never heard that....UMMMMM really? Has anyone else not heard that?? She sounded pretty annoyed that she couldnt wear a white beaded dress that my FMIL was going to lend to her. And ladies.....who borrows dresses from their FMILs like that???? I dunno.....