Try adding a bit of red food coloring, a little bit at a time until the desired color of blue is achieved. To much red will turn the blue to purple. Try using a toothpick with the red. Best to try...
ok first you boil vinager and water . Then you put blue spinkles into the water to make a sweet scent ....And where do you get the blue sprinkles at walmart where you can get the blue food coloring.