Pie Chart - increase Overlay transparency OR Increase selected area color brightness

Hi ,

I am trying to increase the overlay / blurred area in the pie chart which is displayed when selecting any value in it. Power BI automatically sets the color brightness  intensity of selected value and the blurred area color to white wtih some transperancy.

Is there any way to increase the color brightness of the selected area in the pie chart or to increase & decrease the blurred values in the pie chart.

Kindly give me some ideas regarding the same. Thanks in advance.