DB2: Pie/Donut Chart legend/segment outlines

Is there a way to get rid of the white outlines of the chart and around the legend? I’m using a black background and the outline(s) actually make the chart segments smaller and more difficult to see.

The gauge doesn’t have the outlines and is much clearer on a dark background

On a side note, in DB1, the legends on charts could be positioned to the side (by resizing the widget) but this does not appear to work in DB2

DB1 Donut Chart: