evidence: For quite a while, there have been fake claims making waves on the internet about what these colors mean. You’ll find images of these colors next to what they allegedly describe. Black means "all chemical" or "pure chemical", green means "all natural", red means "natural and chemical", and blue means "natural with medicine". Though if you simply view the ingredients of a toothpaste marked with a green or blue rectangle, you can easily see that is not true at all. [...] If you want to know what is in a certain tube of toothpaste, you could always read the ingredients on the package. Common types of toothpaste ingredients include sweeteners, flavor agents, humectants, surfactants, abrasives, binding materials, and, of course, fluoride. Each of these types of ingredients are included to give the paste different purposes and properties, whether to improve its cavity-fighting abilities, making it better to taste, or making it last longer in the tube.Summary The truth about toothpaste color codes is that the internet pictures making the round are actually hoaxes. The color codes are actually marks’ from when the toothpaste’s packaging was made. When finding out what toothpastes contain, always review its ingredient label.