Step 1: Fill a tall hurricane or highball glass to the brim with crushed ice to ensure your jamaican purple rain stays ice-cold.
Step 2: In a cocktail shaker filled with ice, combine the Jamaican white rum, lime juice, and pineapple juice.
Step 3: Shake vigorously for about 15 seconds until the outside of the shaker feels frosty, which is vital for a perfect jamaican purple rain.
Step 4: Strain the mixture into your prepared glass over the fresh crushed ice.
Step 5: Slowly pour the Blue Curacao and then the grenadine over the back of a spoon into the drink. Watch as the jamaican purple rain transforms into its signature violet color.
Step 6: Stir gently with a bar spoon to combine the colors if desired, or leave it layered for a more dramatic jamaican purple rain look.
Step 7: Garnish with a lime wheel and a maraschino cherry, and serve your jamaican purple rain immediately.