You have a Power BI tenant. You need to ensure that all reports use a consistent set of colors and fonts. The solution must ensure that the colors and fonts can be applied to existing reports. What…

A Power BI report theme file, typically in JSON format, explicitly defines a consistent set of colors, fonts, and visual properties. These theme files can be easily imported and applied to any existing Power BI report, ensuring uniform branding and design across multiple reports efficiently.

A PBIX file is a complete Power BI report file containing data and visuals; it's not a standalone file type for defining and reusing themes across other reports.

A Power BI template (PBIT file) saves the report structure without data, which is useful for creating new reports based on a standard layout, but a theme file is the specific and most flexible mechanism for applying consistent styling to existing reports.