CefSettingsBaseBackgroundColor Property

Background color used for the browser before a document is loaded and when no document color is specified. The alpha component must be either fully opaque (0xFF) or fully transparent (0x00). If the alpha component is fully opaque then the RGB components will be used as the background color. If the alpha component is fully transparent for a WinForms browser then the default value of opaque white be used. If the alpha component is fully transparent for a windowless (WPF/OffScreen) browser then transparent painting will be enabled.

public virtual uint BackgroundColor { get; set; }

public:
virtual property unsigned int BackgroundColor {
	unsigned int get ();
	void set (unsigned int value);
}