Home Page Design

I was hoping to get a quick answer from you guys. We have the paid version of the app, and wanted to make some minor changes before we go ahead and publish it. I have attached a picture of our “home screen” or main menu starting point for the app. We were hoping to make all 4 categories different colors (blue, orange, green, and light blue). Is there any way we can do this? I have tried but it only changes all 4 at once. Thank you for your time and your help!