Add the sugar and 1 cup water to a small saucepan. Warm over medium heat, stirring until the sugar completely dissolves. Remove from the heat and let cool slightly.
Juice the lemons until you have 1 cup of fresh lemon juice. Strain out any seeds and excess pulp.
Pour the fresh lemon juice into a large pitcher and add the cooled sugar syrup.
Stir in 1/2 cup of your preferred pink coloring ingredient such as strawberry syrup, raspberry syrup, cranberry juice, grenadine, or pink lemonade syrup.
Add the 4 cups of cold water and stir well until fully combined.
Taste and adjust by adding more cold water, lemon juice, or syrup as desired for flavor and color.
Refrigerate for at least 30 minutes to chill before serving.
Serve over ice and garnish with lemon slices, fresh berries, or mint if desired.