Themes are a new feature that you can define in the Element Style tab in the updated charting engine.. The following new data element color themes have been added with preset color selection:
Classic—Legacy Oracle Hyperion Financial Reporting colors
BI—Colors from Oracle Business Intelligence charts, affects the first 12 elements
Excel—Default chart colors from Excel, affects the first 25 elements
Themes are used as a starting point for element colors. You can change the colors for specific elements in the chart.