change background color with transparency

[MacawSelf]

I changed the color but the map's edge have not change to transparency

// Make the background of the window transparent
"transparent": false,

	// Change the background color of the window even with transparency
	// The color should be in hexadecimal color code
	// like #FFF or #FFFFFF to normal color and #80FFFFFF to color with transparency
	"backgroundColor": "#35395a46",

how to change the config to make it like this

[boltgolt]

Restored issue after OP edit. Seems to be a electron issue where the window decoration is not hidden