Cocktail attire with a more formal twist is advised. Steer away from loud prints and neon colors. T-shirts and denim won't make the cut. Heals or Dress shoes are a must. You are free to express yourself and wear almost any color but keep in mind that you don't want to outshine the wedding party, muted tones are always a safer bet. The more dressed up the better but comfort should be a part of your decision.