I don't own H2O's so I used acrylic paint in my first sample.
This is my second sample and I used Pearlescent Inks. You can't see the embossed image very well. I used the salt crystals left over from the first experiment on a blue/purple base so the colour leached out. Also the tray I sat the paper in was metal and it rusted a bit with the water so this has added to the result as well.