evidence: Fact Check: No, Colored Boxes On Toothpaste Tube Don't Represent Its Ingredients [...] Posts shared on social media claim that different colours on the strip at the bottom of toothpaste indicate its ingredients. An image being shared with the posts says that the black stripe represents pure chemical, the red stripe represents natural and chemical composition, the blue stripe shows natural and medicine, and the green stripe shows natural. The image is shared with the caption, "Meaning behind the colour codes of Toothpaste: BLACK-pure chemical, RED-natural + chemical, GREEN-natural, BLUE-natural + medicine." [...] The website of Colgate mentions that colour code means nothing. According to the website, if you want to know what kind of ingredients your toothpaste has, don't look for a coloured block at the end of the tube. Instead, take a look at the packaging for a comprehensive list of ingredients.