If you would like to have some kind of nice and distinctive bathroom design then you may try to take a look at vintage bathroom wall tile. Usually those tiles have a number of shapes and forms and colours.
One of the most common vintage tile ideas is to use hexagon shape tile for both, walls and floors. Though usually it is more suitable for the floors yet can be nicely laid onto the walls, too.
For the vintage style it is better to use white sanity and sinks, but for the most extravagant solutions black common toilet bowl and bidet, or even hanged bidet and toilet bowls, sink. The bath tub should have nice shape without sharp edges. The black colour will be just amazing and it is able to highlight the sophisticated interior bathroom design. All those ideas you can see on various pictures and photos.