You may have seen articles floating around that say things like this:
-Green – All Natural
-Blue – Natural + Medicines
-Red – Natural + Chemicals
-Black – All Chemical
Sadly, it isn’t that easy. The colored squares on the bottoms of toothpaste have nothing to do with their formula inside. They’re known as “eye marks” or “color marks” and are printed marks that can be read by light beam sensors. They identify where the product packaging is to be cut or folded, not what their contents are.
These eyemarks aren’t limited to the colors we quotes above, and a lot of the time aren’t actually visible on the final product.