Preheat the oven to 325°F (160°C).
Mix graham cracker crumbs, sugar, and melted butter until combined.
Press the mixture into the bottom of a springform pan to form the crust.
Bake the crust for 10 minutes and let it cool.
Beat cream cheese and sugar until smooth.
Add sour cream and mix until combined.
Incorporate eggs one at a time, mixing well after each addition.
Stir in vanilla, cocoa powder, buttermilk, and red food coloring until evenly blended.
Pour the cheesecake mixture over the cooled crust.
Bake for about 1 hour, or until the center is set.
Let the cheesecake cool in the oven for 1 hour.