princess diana caring dress auction sells for US$500K at Princess Diana's Iconic "Caring Dress"
Description
And taken out of a work context, it can look very chic

It is also perfect for sweet-16 quinceanera prom
Brown leather shoes, particularly in lighter shades like tan or cognac, suit summer cocktail attire beautifully
NA-KD Tie Detail V-neck Womens Ora Dress Of course, the color black is one of the most well-known colors in fashion

Bonus if you use honey, which works as a salad dressing emulsifier, too (more about emulsifiers in a bit)

ATTIC USA Fashion Product VINTAGE 90s Blue Iridescent Taffeta Ball Gown Prom Dress by Zum Zum Sz 11/12 | 1990s Formal