What color should I wear to a wedding as a guest: As a guest, avoid wearing white, ivory, or any color too close to the bride's dress. For formal weddings, jewel tones, metallics, or classic shades like navy and black are great choices. For casual or outdoor weddings, light pastels, florals, or soft prints are ideal.This satin dress features a sweetheart neckline that leads to a darted bustier-style bodice. Side slit accent. Open back features cross-straps.