The Best 40Th Wedding Anniversary Party Themes Ideas. Whether you're celebrating your first or 60th, this handy guide to wedding anniversary. Web use the color red and ruby jewels as the theme for your 40th anniversary party.

The traditional 40th wedding is the ruby, a deep red gemstone that symbolizes passion, loyalty and devotion. Web so here’s a list of 40 th wedding anniversary party ideas and themes to consider: Wear red and ask your guests to wear red too.