I would clean the grout lines to help bring back the floor pattern, Green and gray are a good alternate, gray walls with splashes of green.. or a fun wall paper.

Research the Greenbrier Resort, Dorothy Draper as well as Carlton Varney. Their wallpapers are on the expensive side but they will give you some good ideas based on their timeless and elegant style. Their bold colors would be perfect in your bathroom.

Green and pink is lively, but you can also use pink/beige or pink/white with textures for a more subtle look.

https://savethepinkbathrooms.com

and

https://retrorenovation.com/?s=pink+bathroom

@lizziesma do you have a photo you could share? I’d love to see what you did.

Peerless Pottery McKinley Toilet With Seat, Venetian Pink, 20.06"x29.88"x33" · More Info

gray or greige is always a nice complement to pink

I like this retro drape to use outside the bath tub to add interest. Paint the walls gray and add art.

pooh! great floor and tub! change out that sink for the pink posted above and pink toilet!

I would not entertain a curtain at the tub that wasn't from floor to ceiling.

That looks like a dusky pink on my screen. Have you thought of coral or orange? Navy? I think a lot of colours look good with pink but my favourite pink combos just might be pink, white and gold. Do the wall tiles have any iridescence to them? I'm thinking mother of pearl with that pink would be very pretty.

This takes me back! We once moved into a house that had what I called 'dusty pink' toilet, tub and sink. I like Beverly's suggestion of gray/greige. Makes me think we should have kept ours.

It usually helps if you list the parts you want to keep as is and what you are willing to replace...as is..I would consider the tub an accent color..add neutrals on walls and floors and go with pink accents in curtains with stripes and solids to avoid the cutesy look

May I suggest pink and smoky oyster gray, as in this 1955 Chevy...

This article might interest you: Populuxe - modern art deco trend interior inspiration. They showcase a few palettes and you might be inspired by all the curves.