Feature Request: exposed fill properties, best practice to add a custom legend for line series group about axiis HOT 1 OPEN

I see that fills is exposed on the lineGroup, however if I try to iterate 
through the
fills and apply them to my legend, the color is always gray.

    private function getColor(iteration:int, obj:Object):Number
        {
            return areaPalette.colors[iteration];
        }

The above gives me all black fills, not sure if I am using the api wrong, but 
if I
copy out the halo theme, and then iterate over the that array with my repeater, 
I get
the fills, I just can't seem to get the fills working correctly.  

I am probably doing this wrong.