D-Tools provides some default themes for reports, and you can download them and select a theme for the reports.
You also have the option to create custom report themes from the Themes tab in Report Explorer.
Current SI Reports
1/ On the Reports Themes form, click the New button.
This will open the New Theme form.
2/ Select an object or text in the preview window and then select a color from the right side of the form.
You can also manually enter the Hex number or RGBA values.
There are tabs for the different sections of the report.
3/ When done, click Save and Close.
Your custom theme will be displayed in the list of themes.
These themes are automatically saved to your SI Server and are available to all users.
Legacy Reports
If you are using Legacy reports, you can also create custom themes for them. You will need to create two graphics for your new theme to load.
1/ On the Reports Themes form, click the New button.
This will open the New Theme form.
2/ Give your theme a name and use the [...] buttons to browse to the graphics you have created for the report header and the group header.
3/ Click Save.
Your report theme will be displayed in the list of available themes.
Custom themes for Legacy Reports are user-specific and machine-specific. So, if you want to share these with other users of SI, you will need to manually copy the folder (the folder is named whatever you named your theme) from your machine to their machine.
Themes are in the following folder: C:\Users\username\AppData\Roaming\D-Tools\SIX\Data\Reports\Themes.