In a small saucepan, combine equal parts granulated sugar and filtered cold water over low heat. Stir gently for about 5 minutes until the sugar completely dissolves. Once dissolved, remove it from heat and let it cool completely.

While the syrup cools, take 4-6 fresh lemons, roll them firmly on a countertop, cut them in half, and squeeze the juice into a measuring cup, ensuring you remove any seeds.

In a large pitcher, combine the cooled simple syrup, freshly squeezed lemon juice, and 4 cups of filtered cold water. Gently stir until well combined.

Gradually add a few drops of food coloring or a teaspoon of activated charcoal into the pitcher while stirring, keep adding until you reach your desired deep black hue.

Fill clear glassware with ice cubes. Pour the mixture over the ice, letting it cascade beautifully. Rim the glasses with black sugar or garnish them with lemon wheels.