Just imagine for a moment that were no more white bathroom suites. No white loos, no white baths and basins and no white shower trays. No white bidets either! Your replacement bathroom or shower room will be coloured. What colour would you really like, what colour would you grudgingly put up with and what you avoid ?
I'd like pampas. It's pale and inoffensive.
I'd put up with pink as long as it's not shocking pink!
I'd avoid dark brown completely. Too many hidden marks and stains and just utterly dull and grim!
By the way, if your current bathroom is coloured and you like it - great. But white seems to be the way nowadays.