Color Changing Dolphin

What do the colors of this necklace and Moody say?

My mother bought me a mood ring a few years ago when it was Las Vegas, Nevada. She thinks she bought at the Rainforest Cafe. I threw the package when I have it, thought it was garbage, but it has meanings of colors in the back. The necklace is very simple. It is simply a string of black with a latch and a charming little color change circular (depending on your mood ') with a small dolphin in the center. Can you tell me how to know what colors are supposed to mean? Yes, I know it is changing due to temperature. It's just a novelty item for some, however, and I wanted to know what is supposed to be. It's just for fun - a nice little gem. I do not care if it works. It's just nice.

Maybe that will help.

Color Change Card Trick