Methamphetamine belongs to the amphetamine family. It is a powerful upper that produces many super feelings along with a variety of adverse reactions. In its pure hydrochloride form, known as Crystal Meth, it is more potent, colorless, and easier to make than amphetamine. Meth is usually white or slightly yellow, depending on the cooking process and how it is rinsed. I have seen pink and even green colored meth. Here is what the different colors mean: