It is ok to wear a purple coat and white trousers at the wedding. In modern society, the code of wedding dress has become diversified and inclusive. As a gorgeous and elegant color, purple can better show personal style and taste. White trousers are a classic collocation choice, which is in sharp contrast with purple tops. The most important thing is to respect the wishes of the couple and the overall atmosphere of the wedding, and ensure that the dress will not be too prominent or inappropriate.