You can do this with Stardock app décor 8 where you can change font colors backgrounds etc. I did not think I was going to like this app but really like all the customization. The best part is you can add a clock to the top of your start screen all the time. I have the 30 day trial Rt now. Decor8 - Personalize the Windows® 8 Start screen with Decor8?!