In French, people who know how to handle personal events in an elegant fashion are said to have l'art et la manière. In other words, not only have they acquired the art of doing things correctly, but they also have a manner of adding a flourish of style. Good examples: the way in which cousins of my children have informed me of January 2007 births in the family:
When the art and the manner are accompanied by a tiny but supreme detail, this is often referred to in French as "the cherry on the cake". In the case of the pink envelope, it's the postage stamp, which I've enlarged so that you can see the details:
The text at the bottom says: It's a girl. And the image shows a plump pink baby girl emerging from a rose.