This is a cool Cyan GO SMS Pro Theme. This is not a standalone app, you need to download GO SMS in the Play Store.
You can download the installation package of GO SMS Cyan Cobalt Theme 1.3 free of charge and take a look at users' reviews on Droid Informer. The app requires Android 1.6 and above. The download of this application is 100% safe. Dustinb is the developer of GO SMS Cyan Cobalt Theme which can be found in the Personalization category.
The app was downloaded and set up by over 50 users and its most recent stable update was on May 13, 2013. Google Play shows that this application is rated 4.6 by its users.