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. [...] The color codes do not have anything to do with the toothpaste inside, but rather they are simply marks’ that were formed when the packaging is manufactured. These marks are picked up by light beams, which give signals to machines for where to cut, fold, or seal a package. [...] 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.