In a small pot over medium heat, combine the sugar and 3/4 cup of water. Stir gently to dissolve the sugar, bringing the mixture to a boil. Once boiling, reduce the heat and let it simmer for 3-4 minutes until fully dissolved. Remove from heat and mix in a small amount of black gel food coloring until you achieve your desired deep hue. Allow the syrup to cool.

In a large pitcher, combine the cooled simple syrup with 1 1/2 cups of freshly squeezed lemon juice. Pour in 4 cups of cold water and stir gently. Taste and adjust sweetness as needed by adding more sugar if desired.

To serve, pour the lemonade mixture over a glass filled with ice cubes. Garnish with a creepy decoration like gummy worms or a lemon slice if desired.

Store any leftovers in an airtight container in the refrigerator for up to 3 days. Stir well before serving again.