Divide batter equally into four bowls. Add a drop or more of each color of food coloring gel to each bowl. The amount of food coloring used will depend on the potency you are using. Add until you reach your desired color.
Pour purple mixture over prepared crust and smooth it out. Place in the freezer for 15 minutes.
Repeat step 9 with the yellow, pink, and blue batters.
Cover with plastic wrap and chill for at least 4 hours before serving.
Notes
Using room temperature cream cheese will keep you from having lumps in your cheesecake filling.
Store your leftover cheesecake in the fridge, covered or in an airtight container, in the fridge for up to 5 days.
Before slicing, run your knife under hot water for smooth cutting and easy and quick clean-up.