Red wedding cakes - what makes them so special? Red is passion. Red is seduction. And believe me when I tell you that sneaking a little bit of red into the celebration will actually have a physical affect on your wedding guests. It's true. Studies have shown that the color red gets people excited, their hearts beat a little faster, and blood pressure goes up - just a smidge. More pumped up people on the dance floor - more living the dream on this perfect day.