There are several reputable platforms where you can browse and download pre-built themes for free or as part of a premium service: Use report themes in Power BI - Microsoft Learn
Power BI report themes allow you to apply design changes—including colors, default visual formatting, and custom style presets—to your entire report with a single click. By utilizing a theme file (typically in ), you can standardize the aesthetic of your data visualizations without manually formatting every single chart. Top Sources for Power BI Dashboard Themes power bi dashboard themes download