The whole point is that under the lighting conditions in the photo, people can perceive either black and blue or gold and white, and neither is necessarily more correct than the other, because of the Purkinje effect
So, even though it hugs your body, it still has some give to it too
For an elevated look, you can try wearing capris with a blazer buttoned with a belt in a similar shade or fabric, or wear the blazer open with a simple graphic tee shirt to dress it down
Its a good idea to choose something a shade deeper than the dress youre wearing
And I promise all eyes will be on you throughout the event (as they should)
The formality is still there, but theres more scope to play with fabric, colour, and detail