We announced a huge bug earlier today which affects Samsung devices that have the Swiftkey keyboard preinstalled. Once your phone has auto updated the language of the keyboard you are safe since your device is only open to hacking during that short period while the phone updates. Still Samsung will be updating their devices to totally eliminate the bug.
If you wanted to give your stock keyboard some color you are in luck. Themer "DjDarkknight" has released his modified version of Swiftkey which includes 20 themes. There are both light and dark themes which all include some color. SuperSwiftkey was even recently updated to include even more goodies grab the updated tester version from the link below. Go to the first page of the thread for the stable version.
via XDA