Mixing Textures: Textures can do so much on head-to-toe solid-coloured outfits
They called this movie church. Gerwig had a sense that Barbie was being guided by old soundstage Technicolor musicals, so they watched a bunch of those, most helpfully The Red Shoes and The Umbrellas of Cherbourg
The asymmetrical design of the A-Line/Princess Off-The-Shoulder Short/Mini Tulle Cocktail Dresses With Appliqued Beaded is a fun option for the prom
Soft florals, fresh corals, ocean blues, and warm neutrals all suit the environment and photograph beautifully against the natural backdrop
Also, consider the formality of the event
They hold up well, are easy to wipe down if dirty, and can hold everything from a laptop to a water bottle to an extra layer in case the office air conditioning is blasting that day