She was famous for her beauty. Madame Pierre Gautreau is wearing a low-cut black dress that shows off her pale skin.
VOA: special.2010.08.04
To take but one example, it is written that women should dress modestly, but nowhere is it stated that they should be covered from top to toe in black.
The Printing Dressis a Microsoft Research creation thatis essentially a screen that allows you to text your thoughts onto the dress for everyone to read.