Preheat oven to 350°F (175°C).
Mix flour, sugar, and cocoa powder together.
Combine buttermilk, oil, eggs, and food coloring.
Blend wet and dry ingredients until smooth.
Pour batter into greased springform pan.
Bake red velvet base for 25 minutes.
Beat cream cheese until light and fluffy.
Add sugar, eggs, sour cream, and vanilla.
Pour cheesecake mixture over baked base.
Bake for 45 minutes until center sets.
Cool completely before removing from pan.
Top with fresh sliced strawberries before serving.