"subtle luxury" is a correct and usable phrase in written English.
You can use it when you want to describe something luxurious, but not ostentatious or overdone. For example, "The decor in the hotel room was subtle luxury - all the furniture and textiles were luxurious, but nothing was too flashy."
They contrasted with the sophisticated oxidized silver jewelry and the subtle luxury of the brand's signature bags.
For all its intense craftsmanship, this was deep and subtle luxury for a designer who has soared through a learning curve.
This is subtle luxury, by Dubai standards: The flashy apex may have been the huge opening of the Atlantis Hotel in 2008, where $20 million worth of fireworks dazzled a celebrity crowd at the hotel including Robert De Niro, Kylie Minogue and the Bollywood star Priyanka Chopra.
Situated at the northern tip of the Great Barrier Reef, 28km from Cape Flattery, this pristine wilderness is interrupted only by the all-inclusive five-star Lizard Island Resort, an extraordinary outpost of high civilisation which, for around £800 per couple per night, offers a lodge bar, hilltop restaurant, subtle luxury villa, beach club and even a pillow menu for the discerning sleeper.
These are smoothly finished interiors with subtle luxury cues.
The collection is a reflection of Amy's personal aesthetic with a focus on comfort and subtle luxury.
The rooms, as one expects, are of the highest grade, offering subtle, unshowy luxuries galore (British sockets, for instance).
Younger generations want a more subtle expression of luxury.
The rooms may be plain, but the view out the windows provides a subtle sense of luxury.
Today the muted logo-free look that is the brand's signature is widely regarded as the standard-bearer for a new kind of luxury: subtle, long-lasting and recession-proof.
Despite that aggressive subtext, slashing, which dates at least from the age of Henry VIII, can be an expression of subtle refinement and luxury, one that surely appealed to Christophe Decarnin, whose spring collection at Balmain highlighted a succession of beat-up-looking officer's coats ripped to reveal not the brocades of Henry's day but a rich underlayer of glistening gold mesh.
