1. Prepare the Crust:

1. Preheat oven to 325°F (165°C). Mix graham cracker crumbs and melted butter, then press into a 9-inch springform pan to form the crust.
2. In a large bowl, beat cream cheese and sugar until smooth. Add vanilla extract, eggs (one at a time), and sour cream, mixing well after each addition.
3. Divide the batter into four bowls. Add a different gel food color to each bowl and mix until vibrant.
4. Drop spoonfuls of each colored batter onto the crust, then use a knife to swirl gently for a marbled effect.
5. Bake for 45-50 minutes or until the center is set. Let cool, then refrigerate for at least 4 hours.
6. Garnish with whipped cream and sprinkles before serving.