Element Background Opacity w/out affecting children

backgroundOpacityLessMixin

/* The opacity: .5 CSS property will make the container and its
 * children transparent. This LESS mixin can be used to set the
 * background-color property with opacity resulting in a transparent
 * background color with full opacity children.
 */
.backgroundOpacityRGB(@red: 0, @green: 0, @blue: 0, @bgOpacity: 0.5) {
	background: rgb(@red, @green, @blue); // Fallback to full opacity bg 
	background: rgba(@red, @green, @blue, @bgOpacity); // Alpha'd bg color for 'modern' browsers
}