Some of the rules are pretty straightforward and easy to follow (e.g., don't wear white, don't show ... something that skews more casual but is still fit for a wedding, go for any of the simple ...

AbacaPress/SplashNews.com Lauren Sánchez held hands with Jeff Bezos while wearing a white and yellow dress on vacation in ... In another casual moment, Lauren Sánchez wore her low-key white ...