Mood rings are worn to theoretically display the mood or temperament of the person wearing it. They are made of thermotropic liquid crystals which essentially are liquid crystal molecules that react to a change in body temperature. When there's a change in temperature, these molecules move around and reflect and absorb different color wavelengths.

While mood ring colors can't predict one's mood, they can provide a very vague indication of the way a person might be feeling. Still, it's not based on reliable science, so mood ring colors won't always reflect the wearer's real mood. Additionally, the weather can affect the color displayed on a mood ring irrespective of the wearer's mood. A hot day can heat up the mood ring, for example.

The mood ring colors range the entire color spectrum, but a few colors come up more often than others. The first is black. Black is generally the color the mood ring will be when no one is wearing it. However, black can also mean that the wearer is exceptionally tense, stressed, or overworked. Gray is rarely seen, but it can mean that you are nervous, anxious, or sad.

Green is considered the most neutral of the mood ring colors. It is generally taken to mean that the wearer is in an average, normal state of mind; is relatively at peace and is feeling calm. Green is the "ideal" of all the mood ring colors.

The blues in mood ring colors are often taken to mean that the wearer is relaxed, happy, or emotional. Dark blue can sometimes indicate passion or love. The blues can also indicate an extremely peaceful state of mind.

The warmer mood ring colors can indicate a more enthusiastic state of mind. Amber can indicate mixed emotions, whereas yellow symbolizes an imaginative state of mind, or possibly boredom. Oranges and reds signify excitement, an adventurous, restless state, or even impatience and aggressiveness.

A pink color can demonstrate fear and uncertainty, or it can mean that the wearer is mellow and happy. A dark purple color nearly always signifies a sensual feeling, or romantic love. It can also indicate moodiness.

Going through the mood ring colors, one can see that there is much similarity among their associated meanings. These rings and their meanings should not be taken too seriously but they are often fun to consider. They can usually be purchased for a relatively inexpensive price at many toy and discount stores.