Google chart API styling tooltips

Question

Is there a way to style Tooltips in Google chart API? I've managed to only change the color of text using tooltip.textStyle. So is there any solution to change the white background to some other color (as shown on picture):

Test playground http://jsfiddle.net/nyNAg/

Answer 1

I found a solution through serendipity:

<style>
path {
  fill: yellow;
}
</style>

Anyway, I did not find any configuration option for background in the google charts API.