Wedding guest etiquette: What in the world do I wear? » Page 5 of 13 » Timing is everything: This doesn’t just apply to life, but also to wedding guest attire. Both Ordonez and Ma suggest that wedding guests consider the season and time of day, too, which means it makes sense to wear lighter and brighter colors in the spring and summer. Pastels are hot now as well. For evening weddings, consider darker, jewel tones such as emerald, royal purples or ruby.