They don't have to be the same. I think that the purpose of the bathroom determines the style/choice. For example, if it's a bathroom that only the children and their friends will be, it calls for a different tile than the Master Bathroom or the Bathroom that your guest will be using.

http://www.bonito.in/2014/how-to-chose-bathroom-tiles-as-per-the-designer-point-of-view/ Check out this article which helps you to chose bathroom tiles as per the designer point of view #Bathroomtiles although come in a plethora of designs and an array of colors, it is all the more important to make the correct choices to make your space look aesthetic and neat.

highlight tiles are really not in fashion. it was 5 - 10 years back. i would suggest go with the bottom less distracting simple design throughout. carry dark floor tiles up 3 inches on the wall as skirting. ensure the centre line of your shower fixture and its wall controls lie in the centre of the tiles. that would be your starting point. rest will fall in place. ideally the ceiling height should not be more than 8 feet. if its more you end up with an uneasy proportion. either do gypsum false ceiling at 8 feet or stop the tiles at about that height and paint the rest of the wall in dark grey or purple and have pendant light that throw light below 8 feet. good luck.

pls suggest bathroom tile colours for wall & floor.