In the picture above you can see a bit of color variation on each nail (a bit darker at the tip).
The base color used was Icing's Hyper Sensitive from the Mood Swings line. It changes from a dark to bright green based on temperature. The stamp used is from Konad plate S06. I used Konad special white to stamp. I only stamped the thumbs this time because I was extremely tired, but wanted to see the stamp over a color changing polish.
Now for a color test. First we'll use cold water.
As you can see, with cold water the polish is a pretty dark / forest green.
Now for the hot water test:
As you can see, with the hot water, the polish is a beautiful bright green.
I could use some more stamping practice as my aim is a little off, but all in all I think this is a winner!!