I have build a bunch of reports and are using the graphs. These reports consist of campaign data, and I need to create the graphs so that the leads are blue in color, and the contacts are green in color. These are separate reports. I can't figure out how to change the graphs from one color to the next?... Anyone?

I have build a bunch of reports and are using the graphs. These reports consist of campaign data, and I need to create the graphs so that the leads are blue in color, and the contacts are green in color. These are separate reports. I can't figure out how to change the graphs from one color to the next?... Anyone?