vaadin-framework/WebContent/VAADIN/themes/runo/caption/caption.scss

@mixin runo-caption {

.v-captionwrapper {
	margin: 0.3em 0 0 0;
}
.v-errorindicator {
	width: 12px;
	height: 16px;
	background: transparent url(../icons/16/error.png) no-repeat top right;
}

}