TFlexCelHtmlExport.ImageBackground Property
When this property is set to TUIColor.Empty (the default), images will be rendered with a transparent background. While this is the normal behavior, sometimes you might not want transparent images (for example to support Internet Explorer 6 without setting FixIE6TransparentPngSupport to true), and then you could use Colors.White here.
Syntax
Unit: FlexCel.Render
property TFlexCelHtmlExport.ImageBackground: TUIColor