How to change the background color of tooltip

Vaadin 6 / 7 / 8 Framework UI
1

How can I change the background color of tooltip? I tried setting following in CSS but didn’t worked for me. Here I am trying to set background color as Red


.v-tooltip .v-errormessage {
	padding: 3px 4px;
	background-color: red;
	border: none;
	border-top: 1px solid #fff3dc;
}