The "options" parameter included below demonstrates many style changes you can make to a Bubble Chart.
viz.chart({
sql: "SELECT State, PercentTechJobs, EdSpendingOverGdpPercent, 'Source', GDP FROM States",
chartType: "BubbleChart",
containerId: "chart3",
options: {
title: "Trend in STEM Jobs",
titleTextStyle: {
color: "#777777",
fontName: "Arial",
fontSize: 18
},
legend: {
position: "right"
},
colors: ["#bb0000"],
vAxis: {
title: "Percent of Spending\non Education Spending",
format: "percent"
},
hAxis: {
title: "Percent of Jobs in STEM",
format: "percent"
}
}
});