1. **Formal/Black Tie**: Opt for a floor-length gown or a sophisticated cocktail dress for women. Men should wear a tuxedo or a dark suit with a bow tie.
2. **Semi-Formal/Cocktail**: Women can go for a knee-length or midi dress, while men can wear a suit with a tie or a dress shirt and slacks.
3. **Beach/Outdoor Wedding**: Choose breathable, light fabrics and colorful dresses for women, and lightweight suits or dress shirts with dress shorts for men.
4. **Casual**: For a casual wedding, women can wear a sundress or a chic blouse with dress pants or a skirt. Men can opt for dress pants or khakis paired with a button-down shirt or a polo shirt.
5. **Avoid White**: As a general rule, avoid wearing white or off-white outfits, as these colors are typically reserved for the bride.
6. **Comfort and Practicality**: Consider the weather and the venue when choosing your outfit. Make sure you're comfortable and can move freely.
7. **Accessories**: Complete your look with appropriate accessories, such as jewelry, shoes, and a clutch or small handbag.
Always remember to dress respectfully and avoid anything too revealing or attention-grabbing. It's also a good idea to check with the couple or other guests if you're unsure about the dress code.