Update: with the release of iOS 8, Apple now allows third-party keyboards in the App Store. If you're looking for a different keyboard for your iPhone or iPad, make sure to check out our list of iOS 8 keyboards.
I generally hate jailbreak releases that feature goofy names like ColorY0urBoard, but I decided to give the new jailbreak app a try despite my inclinations. To my surprise, ColorY0urBoard is actually not that bad of an app.
If you're searching for a way to easily customize the color of the stock keyboard within iOS, then ColorY0urBoard is a viable option. It's a standalone app release with an interface dedicated solely to changing the keyboard color. The app includes a color wheel, much like you'd find in image-editing applications, and it also features brightness and alpha sliders to perfect your customized look.
ColorY0urBoard isn't perfect, but it does a pretty good job of customizing the look of your keyboard. Have a glance at our video walkthrough inside for more details.