I’m completely in love with Olivier Theyskens’ collection for Theory, aptly named Theyskens’ Theory. It’s everything I consider basics should be: gorgeously cut and constructed in an array of quality fabrics like silks, cottons, wools and leathers. I can’t think of a single person that wouldn’t benefit from having a thing or two from this line in their closet.
The super pretty “Dewi” dress is one of my favourite pieces from the collection (and they are many!). While it also comes in blue, as well as a splattery paint print, the rich deep purple really gets my heart. This dress is all about little Theyskens touches: the criss-cross black straps, the irregular hemline and the pockets. I love a dress with pockets! 
Now, ten years from now — this dress just works. 
$346.50 (on sale from $495) on Shopbop.