Preheat the oven to 350°F (175°C). In a mixing bowl, combine crushed Oreo cookies and melted butter. Press the mixture into the bottom of a springform pan to form the crust.

In a large mixing bowl, beat the softened cream cheese, sugar, and vanilla extract until smooth. Gradually fold in the whipped cream until well combined.

Add the violet food coloring and dissolved gelatin to the mixture, stirring until evenly colored.

Pour the filling over the prepared crust in the springform pan. Smooth the top with a spatula.

Refrigerate for at least 4 hours, or until set.

Once set, remove the cheesecake from the springform pan. Top with whipped cream and decorate with Oreo cookies before serving.