Line a baking sheet with parchment paper and set aside.
In a microwave-safe bowl, melt the white chocolate chips in 30-second intervals, stirring in between, until smooth. Pour the melted white chocolate onto the prepared baking sheet and spread it into an even layer.
In separate bowls, melt the red and blue candy melts using the same method as the white chocolate.
Drizzle the melted red candy melts over the white chocolate layer, followed by the blue candy melts. Use a toothpick or skewer to swirl the colors together gently for a marbled effect.
Sprinkle the crushed freeze-dried strawberries, blueberries, mini marshmallows, and sprinkles evenly over the top.
Place the baking sheet in the refrigerator for about 30 minutes or until the chocolate is completely set.
Once set, break the chocolate bark into pieces and serve.