Young Queen Victoria of England broke fashion rules..

.. and when she married, she wore (gasp) white.  Previously, black was considered formal, and many other colors were worn.  20 years later, after Prince Albert’s death (Victoria’s beloved husband who died of TB after a visit to their son), black was the rule for mourning, and an entire fashion industry was developed around mourning apparel worldwide.

Many of Victoria’s innovations in fashion would become the norm even to today.

(Photo: Queen Victoria and Albert’s first born child, Victoria, was married in 1858 in the epitomy of Victorian wedding white)