Background on WP7 icon

Question

I have created an icon for my WP7 application. The icon got a transparent background and the theme on my WP7 device is set to the blue theme. When deployed to the device my icon got a dark gray background instead of the blue from the theme.

Any ideas how to adopt the theme background color as background to the application icon?

Answer 1

Icons used for tiles support transparency but those used in the application list don't - disappointingly.