Optional: Rim the glass with salt or sugar by running a lime wedge around the rim and dipping it into salt or sugar.

Fill the glass with ice cubes.

In a cocktail shaker, combine the tequila, lime juice, triple sec, cream of coconut, blue curaçao, and pineapple juice.

Fill the shaker with ice and shake well for about 15-20 seconds, until the mixture is well-chilled.

Strain the mixture into the prepared glass over the ice.

Garnish with a lime wheel, pineapple slice, or cherry if desired.

Sip and enjoy your refreshing Blue Hawaiian Margarita.