If you saw a picture on Internet, it does not mean it was copied from somewhere. It could've been created specifically for that purpose and does not exist anywhere else in the wild.
If I need slightly different coloring, I would just pick one of those and change the color to the one you need.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?