Preheat your oven to 325 degrees Fahrenheit.

Line a 9x13 inch baking dish with parchment.

Add the oreo cookies to a food processor and blitz to crumbs.

Stir in the melted butter until well combined.

Press the oreo cookie mixture into the bottom of the 9x13 pan to make the crust.

Bake for 10 minutes.

Allow the crust to cool completely.

For the cheesecake, in a large mixing bowl, beat together the cream cheese and sugar until smooth.

Add the sour cream, and mix until combined.

Add the eggs, one at a time, mixing until combined.

Divide the cheesecake mixture into 3 bowls.

Leave one bowl white.

To the 2nd bowl, add a generous amount of red gel food coloring, and stir to combine.

To the 3rd bowl, add a generous amount of blue gel food coloring. Stir to combine.

Drop the cheesecake mixture onto the prepared crust, dividing the colors into sections.

Use a butter knife to swirl the colors.

Bake for 45-50 minutes.

Allow the cheesecake to cool completely, then refrigerate for 6 hours, or overnight.