In a small pot, combine sugar and ¾ cup of water. Bring to a gentle boil, stirring until sugar dissolves, about 3-4 minutes. Remove from heat and set aside to cool.

Once cooled, add a small amount of black gel food coloring to the syrup, stirring to achieve a deep color. Adjust if necessary.

In a large pitcher, combine the cooled sugar syrup with freshly squeezed lemon juice. Pour in 4 cups of cold water, stirring well.

Fill each glass with ice cubes and pour the prepared mixture over the ice, allowing the vibrant color to cascade.

Garnish each glass with a slice of lemon or Halloween-themed decorations like gummy worms or spooky straws.