Green and Graphical
Green is a wonderful colour to use in the bathroom design.
In order to make it a bit more special and graphical, green square tiles could be used both fitted standard way or diagonally.
Picture source: Inrichting Huis
To put an accent on lines and shapes a contrast colour grouting could be used.
Picture source: Techne
White tiles with green grouting will look simple but with a nice kick.
Picture source: Dezeen
Painting wall in green outside wet areas and combining with other graphical tiles in white in black could create quite of a statement.
Picture source: Archdaily
Picture source: Arkpad