setBackgroundColor
Sets the color that will be used to draw the @web_view background.
Sets the color that will be used to draw the @web_view background before the actual contents are rendered. Note that if the web page loaded in @web_view specifies a background color, it will take precedence over the @rgba color. By default the @web_view background color is opaque white.
Since
2.8
Parameters
rgba
a #GdkRGBA