Value: 16843017
Defines the drawable to draw over the content. This can be used as an overlay. The foreground drawable participates in the padding of the content if the gravity is set to fill.
May be a reference to another resource, in the form "@[+][package:]type:name" or to a theme attribute in the form "?[package:][type:]name".
May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".