What does the color on the back of toothpaste mean

What color?
The black and white/ blue and white?
If so that the barcode scanner. 
Hope this helps any! :)

The ink that is used to print tube like the logo the colors that are used for the ink and logo in the tube printed hope this helps<3

Monophony monophony means music with a single "part" and a "part" typically means a single vocal melody, but it could mean a single melody on an instrument of one kind or another.( just a short note ) : )hope it

Studying history is very important so that we learn from past experiences and don't repeat the bad ideas/choices that might have been made. it can tell us how cultures conducted their lives and you can learn about interesting facts you might not know. hope this ! : )