Change color of pie chart label lines in Dashboard?

[JayJohnsonWashoeCounty]

Is is possible to change 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.   

[JayJohnsonWashoeCounty]

Okay, apparently not possible.  I'll add this as an idea.