Step 1: Choose your serving glass, such as a tall glass or hurricane glass. For an extra chill, place it in the freezer for a few minutes.
Step 2: In a cocktail shaker, combine the light rum, blue curaçao, cranberry juice, pineapple juice, and sweet and sour mix. Fill the shaker with ice.
Step 3: Secure the lid tightly on the shaker and shake vigorously for approximately 15-20 seconds until the mixture is well combined and thoroughly chilled.
Step 4: Remove your chilled glass from the freezer (if applicable) and strain the purple cocktail mixture into the glass over fresh ice.
Step 5: Garnish your Tropical Jamaican Purple Rain with fresh fruit slices, such as an orange wheel or a maraschino cherry. If desired, add a splash of club soda for a fizzy finish, then serve immediately.