Why Not White?

My mother-in-law wore white to our wedding. Head to toe, dress, stockings, shoes. She told me she was going to wear burgundy! I was insulted. I tried to explain this to my husband, but he doesn`t see it. What meaning does it have? I need some info for my position. Which colors are off limits, so I don`t offend anyone by accident.
Posted by Elaine; updated 09/01/05