In a pourable measuring cup, add the vodka. Add 5 drops each of blue, green and red food coloring. Stir and see if the black color is dark enough. If not, continue adding 2-4 drops of each at a time and stirring in between until desired color is reached. Set aside.
Wet the rim of the glass and dip in the black sea salt. Pour the Bloody Mary mix and fill glass about 3/4 full. Add Worcestershire Sauce and lightly stir.
To create the creepy black liquid effect, gently pour the black vodka slowly down the side of the glass until a black layer forms.
You can also cut down the recipe and make Bloody Mary shots out of it as well.
Note: Be sure to mix the concoction before drinking... that is, unless you want scary black teeth.
Enjoy your potion!