Unable to change background color of GeoMap properly

[ghost]

I am unable to change background color (GeoMap.BackColor) of GeoMap properly ----- Winforms

Extra notes

Hello, I was trying to set background color of my geomap chart to black, but there are some problems.
Instead of changing the color to black, geomap changes the background color to

I have also tried other colors but when I change the color to any other the color is again not accurate. (this is happening also when enabling the transparent option, the color again changes to (56, 74, 81).
I would be happy if there was any solution to change the background color to custom or at least to transparent.
Thanks for any help

I am using

Live-Charts version	*Livecharts - 0.9.7 Livecharts Winforms - 0.9.7.1*
.Net Version	*4.7.2*
Windows home	*18363.1082*