How to Change Power BI to Dark Mode

Switching your reporting tools to dark mode can be a real game-changer for reducing eye strain, especially during late-night data analysis sessions. This article guides you through how to apply a dark mode look to your Power BI reports using custom themes, giving your dashboards a sleek, modern, and eye-friendly design.

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Why Does Dark Mode Matter in Your Reports?

While a cool aesthetic is a nice bonus, the practical benefits of using a dark theme are what draw most people in. First and foremost, dark mode is known for reducing eye strain by lowering the amount of bright white light emitted from your screen. This is particularly helpful in low-light environments or for anyone who spends hours analyzing data. A darker interface can also improve focus by making the data and visualizations - the content that actually matters - pop off the screen, while the background elements fade away.

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Setting Expectations: The Native Power BI Dark Mode

Let's get this out of the way first: Power BI Desktop does not currently have a one-click, application-wide dark mode switch that themes the entire interface, including ribbons, menus, and panes. Changing your Windows theme to dark mode won't affect it, either.

However, you have complete control over the report canvas where your visuals live. By creating and applying a custom theme, you can achieve a true dark mode feel for the most important part of your report - the dashboard itself. While the surrounding Power BI application will remain in its default light theme, your report pages will adopt the dark, high-contrast look you're after.

How to Give Your Power BI Reports a Dark Mode Theme

The key to creating a dark theme in Power BI is a small text file called a JSON (JavaScript Object Notation) file. This file contains rules that tell Power BI exactly how to style every element of your report, from page backgrounds and text colors to the colors used in charts. You can create one from scratch or, more easily, start with a pre-existing dark theme file and tweak it to your liking.

Step 1: Get a Dark Mode Theme JSON File

You don't need to be a coding genius to start. The Power BI community has created and shared countless theme files you can download and use for free. A simple Google search for "Power BI dark theme JSON" will give you plenty of options.

A few great places to look include:

• The official Microsoft Power BI themes gallery: A good starting point with user-submitted themes.
• GitHub: A treasure trove for developers and analysts. Search for "powerbi-themes" and you'll find repositories full of JSON files, including many variations of dark themes.
• Power BI Community forums: Other Power BI users often share their custom themes in forum posts.

Find a dark theme you like the look of and download the .json file to your computer. We'll be modifying this file in the next step.

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Step 2: Understanding and Customizing the JSON File

Once you have a dark theme file, you can open it in any text editor, like Notepad on Windows, TextEdit on Mac, or more advanced editors like VS Code. You'll see structured text with curly braces {} and quotation marks "". Don't be intimidated! You only need to change a few key lines.

Key JSON Properties for Dark Mode:

• background: This sets your report's background color. For a dark mode, set it to a dark color like #2C2C2C (a dark gray).
• foreground: This sets the color for text elements like labels and other text elements. It's typical to use a light color, such as #FFFFFF (white) or #EEEEEE (a softer white).
• dataColors: This controls the colors used in charts like bar, line, and pie charts. To ensure contrast against a dark background, use bright and vibrant colors.

Here's an example of what a simple dark theme might look like:

{
   "name": "My Dark Theme",
   "dataColors": [
      "#0F6BEB", "#FDC603", "#E91E63", "#9C27B0"
   ],
   "background": "#1F1F1F",
   "foreground": "#E0E0E0"
}

You can update these values as needed to fit your brand’s colors or preferences. For example, you might change #1F1F1F (your background) to something like #121212 (a softer black) or adjust dataColors to your preference.

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Step 3: Apply Your Dark Theme to Power BI

Once you've saved your customized JSON file, it's time to see it in action. Open Power BI Desktop and open the report you want to style. Click on the View tab in the ribbon at the top. In the Themes section, click on Browse for Themes...

Select your custom JSON file, and Power BI will immediately apply your changes to your report canvas, updating the background color, text color, and chart colors according to your specifications. Congratulations! You have just converted your reports to a dark mode style.

Customization Tips for an Effective Dark Mode Theme

When customizing a theme for dark mode, pay attention to contrast. Consider dark shades like #1A1A1A for backgrounds and #EEEEEE for text. This ensures readability and reduces the strain on your readers' eyes.

A Cohesive Color Strategy:

Implementing a dark mode isn't just about using a dark background with white text. Consider using multiple shades for accents, such as #1F8B4C for highlights. This will help add depth to your reports and make different elements stand out.

Final Thoughts

While Power BI may not offer an instant dark mode for the entire application interface, you can achieve a dark theme for your reports using custom themes. By leveraging JSON for theme manipulation, you can build dashboards that are not only attractive but also easier on the eyes during extended viewing sessions. Explore different themes and find the one that best enhances your data presentation, keeping your audience engaged and focused.