understated elegance

Understated elegance is an idiom used for someone who is not obvious, loud, garish, or ubiquitous in the way that they behave. This person is elegant in a more subtle way where it is obvious they are not trying hard to get the attention of others and in some ways, considered subtly chic. They are an elegant person often in their appearance and the way they behave and carry themselves, but not in such an obvious way.