Bug 312531 Highlight works differently when run SvgInteractivityViewer.java [13]
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGGraphics2D.java
elem.setAttribute( "height", Integer.toString( height ) );
		Element elemUse = dom.createElement( "use" );
		elemUse.setAttribute( "x", "0" );
		elemUse.setAttribute( "y", "0" );
		elemUse.setAttribute( "xlink:href", "#" + imgId );
		
		elem.appendChild( elemUse );
		return elem;
	}
	private String serializeHighlightToString( Color cd )
	{
		if ( cd != null )
		{
			int red = ( cd.getRed( ) + 255 ) / 2;
			int green = ( cd.getGreen( ) + 255 ) / 2;
			int blue = ( cd.getBlue( ) + 255 ) / 2;
			String r = Integer.toHexString( red );
			if ( red <= 0xF )
				r = "0" + r; 
			String g = Integer.toHexString( green );
			if ( green <= 0xF )
				g = "0" + g; 
			String b = Integer.toHexString( blue );
			if ( blue <= 0xF )
				b = "0" + b; 
			return "#" + r + g + b; 
		}
		
		return ""; 
	}