Here is one option for the six color 4x4 tile mosaic for the wainscoting in the bathroom. We have the four tiles on the right, but not the purple and the light green. The ones that we have are slightly more subdued in color than these, but you get the picture. It is hard to recreate on the computer.
Keep in mind that the floors are saltillo tile and most of the walls are chocolate brown, almost eggplant.
There is also a neutral granite for the sink and tub surround.
Above the wainscoting will be a neutral tile like this one.
Now, if I can only fine the dark purple tile and the light green tile, we are in business.
edited to add:
Check out this coolness.
Create your own custom blends of tile. This is for 3/4 inch tile, but it gives an idea of what the colors will look like together.