In a small dish, combine sugar and salt. Rim mason jars with lime wedge then dip in sugar-salt mixture.
Combine moscato, Curaçao, tequila, triple sec, and lime juice in blender. Add ice and blend until smooth. (If the mixture is too loose, add more ice and continue to blend.)
Divide mixture between 4 glasses. Garnish with lime wedges and fresh blueberries.