I'm using Pentaho Report Designer version 7.1.0 and have noticed a discrepancy in colors when generating a report using Excel 2007. Specifically, when I add a color for a text field in the report (e.g. #00B0F0), the generated Excel file shows a different color (e.g. #0066CC). Are there any known issues with color representation between Pentaho and Excel, and how can I ensure that the colors in my report appear consistently across different platforms?