chart.draw(data, {
allowHtml:true,
nodeClass: 'myNodeClass',
selectedNodeClass: 'mySelectedNodeClass'
});
.myNodeClass {
text-align: center;
vertical-align: middle;
font-family: arial,helvetica;
cursor: default;
border: 2px solid #b5d9ea;
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
-webkit-box-shadow: rgba(0, 0, 0, 0.5) 3px 3px 3px;
-moz-box-shadow: rgba(0, 0, 0, 0.5) 3px 3px 3px;
background-color: #b0d7ee;
background: -webkit-gradient(linear, left top, left bottom, from(#b0d7ff), to(#b0d7ee));
}
.mySelectedNodeClass {
border: 2px solid #e38493;
background-color: #eeb0d7;
background: -webkit-gradient(linear, left top, left bottom, from(#ffb0d7), to(#eeb0d7));
}