It stands to reason that people who assume that the dress was illuminated by blueish, cool daylight (and mentally subtract as much) would see it as white and gold, whereas people who assume a warm, yellowish artificial light source would see it as black and blue
Formal attire creates a cohesive polished aesthetic across portraits group shots and candid images
She was dressed in a fitted, short-sleeved white shirt and hip hugging jeans
In order to not feel overdressed, you might prefer to go fairly smart on the bottom half, with tailored trousers and desert boots, but keep things more laid back up top, with an untucked Oxford shirt and bomber jacket
The easiest way to transition this formal piece into a casual ensemble is by pairing it with jeans
Keep it minimal with stud earrings and a thin bracelet