To prepare, fill each glass to the top with ice.
Add the tequila, blue curacao, simple syrup and lime juice into a cocktail shaker. Shake well.
Pour into your glasses and enjoy!
*To rim your margarita glasses: use a wedge of lime and rub it around the rim of the margarita glasses. Then, dip your glasses into the margarita salt and rotate it around a bit to get the salt to stick well.