CefBrowserSettingsBackgroundColor Property

Opaque background color used for the browser before a document is loaded and when no document color is specified. By default the background color will be the same as CefSettings.background_color. Only the RGB compontents of the specified value will be used. The alpha component must greater than 0 to enable use of the background color but will be otherwise ignored.

public CefColor BackgroundColor { get; set; }