You just know some poor sap is going to show up not wearing white (yes, Lamar, we're looking at you), claiming he either "didn't read the invite" or "thought it was just a suggestion." Unfortunately, the one dude who's not wearing white won't just stick out like a sore thumb, he'll invariably become the default focus of the party. Who wants that? Do yourself a favor and have some spare white t-shirts on hand to give guests too dense to know that, yes, you need to wear white to a white party.