Make sure you are using uccw v2.1.2 before using this this skin. You can get the latest uccw from here.https://play.google.com/store/apps/details?id=in.vineetsirohi.customwidget.
If the Blue and Green will not work on your device you can download them from here and import into UCCW.
How to install the skin:1. Add UCCW widget.2. Pick Digital Blue skin from the list inside uccw.3. Touch the hand icon when it appears and wait for a few seconds.