Threshold-Yuzu/resource/styles/colors/titlebar_black.styles

"titlebar_black.styles"
{
	colors
	{
		TitleBar="8 8 8 255"
		TitleBar.Focus="8 8 8 255" //For loss of focus
		Notification.Back="31 31 31 255" //fun fact: on windows 10 this is slightly transparent, so the actual color varies!
	}
}