#spinner {
	background: $alt-font-color-4;
	color: $invert-font-color;
	position: fixed;
	top: 0;
	#{$left}: 0;
	z-index: 1001;
	padding: 3px 15px;
	@include border-radius(0 0 4px 0);
	font-size: 12px;
	display: none;

	.fa {
		font-size: 16px;
		padding: 0 2px;
	}
}
#spinner {
	background: $dark-background-2;
	color: $invert-font-color;
	position: fixed;
	top: 0;
	#{$left}: 0;
	z-index: 1001;
	padding: 3px 15px;
	@include border-radius(0 0 4px 0);
	font-size: 12px;
	display: none;

	.fa {
		font-size: 16px;
		padding: 0 2px;
	}
}
Change spinner background color to correct variable
Change spinner background color to correct variable
