Bathroom Curtain and Linen Color Advice

Choose any colors in the wallpaper

You can't go wrong with a mauve-y pink or periwinkle blue to add a little more interest and not be all match match.

Rug I would do cream or ivory.
For the bathroom curtains I would go with a navy and towels pink.

I'd choose cream or ivory for the curtain, Lighter colored curtains tend to make a room look brighter and more spacious. I'd draw out the rose and navy from the wallpaper with towels and a rug in one of those colors. The photo looks like there's a possibility you could incorporate some gold accessories in your bathroom décor. How about navy and gold towels? Don't be afraid to experiment with unique color combinations. Sometimes, you'll be amazed at how they enhance a décor.

Pink or cream

I like a pale pink or a pale green, I think those would go great