If you google image search "garak turbolift in the pale moonlight", you'll see at about the third or fourth result some photos of Garak wearing a yellow printed shirt with black shoulders that is not unlike a TNG yellow uniform. There's even a horizontal stripe across the black shoulder panels, not unlike the TNG season 1 stripe.
Everything the Cardies wore looked stiff and uncomfortable.
He’s having a laugh as he’s on Starfleet business.