Dashboard - change color of leader lines in pie chart

[JayJohnsonWashoeCounty]

Allow changing the color of label lines on pie charts in dashboard.

Our corporate color for dashboard backgrounds is a medium darkish blue and the pie chart label lines (default color med grey) don't show up against this color.  I see that I can change the opacity of the label line in Chart Options, but there doesn't appear to be n option to change the color of the label line.   

Jay