01 - Combine sugar and 1/2 cup water in a small saucepan. Heat over medium heat, stirring constantly until sugar completely dissolves. Remove from heat and allow to cool to room temperature.
02 - Pour freshly squeezed blood orange juice and lemon juice into a large pitcher. Mix thoroughly to integrate the flavors.
03 - Add the cooled sugar syrup to the citrus juice mixture. Stir well until fully blended.
04 - Pour in 3 cups of cold water or sparkling water. Stir vigorously to combine all ingredients evenly.
05 - Taste the lemonade and modify sweetness or acidity as desired. Add more sugar syrup for sweetness or additional citrus juice for tartness.
06 - Fill glasses generously with ice cubes. Pour the prepared lemonade over the ice.
07 - Decorate glasses with fresh blood orange slices, lemon wheels, and mint sprigs. Serve immediately while chilled.