1 tsp of glue : 3 drops of food colouring : 1.5 tsp of water. The more food colouring the darker the jar will be. In order to make a turquoise shade you will need two drops of blue and 1 drop of green.
tint jars----Pour about a 1/4 cup of Outdoor Mod Podge onto a plastic plate and add 5 - 7 drops (depending on how light or dark you want your color) of food coloring. I used McCormick's Neon Food Coloring (except the yellow - which is from a plain old box of food coloring). BTW - this was MORE than enough of the mixture to cover three glass jars.