The pattern is the costume
A tuxedo cat shows up to the portrait dressed. Black coat as the suit, white chest as the dress shirt, white paws as gloves, white blaze as the open collar. Some tuxedos have a black 'bow-tie' patch interrupting the white at the throat — the literal accessory. The portrait reads the specific pattern from your photo and holds the white as crisp against the black rather than blurring the edge.
Library, Knight, Cardinal, Tudor
The formal portrait styles all flatter a tuxedo because the coat is already doing the work. Library frames him as the editorial subject in a setting that matches the suit. Knight gives him court regalia layered over the formalwear he was born in. Cardinal pairs the black coat with deep red ecclesiastical robing. Tudor places him in Renaissance-era costume that suits the natural elegance.
What to skip
Pop Art tends to over-flatten the markings — the simplification can turn a precise bow-tie or face blaze into a wrong-shaped white blob. Cherry Blossom and other very soft pastel palettes can wash out the black coat. The styles that work hardest for tuxedos are the ones that respect the formal contrast the coat already has.
