If you are using an OLED or AMOLED display, dark themes can actually save battery life by requiring less power to light the screen.
When viewing the generated HTML report in a browser, there is typically a theme toggle (often a moon/sun icon) in the header to switch between light and dark modes. postman dark theme
If the dark theme makes text feel a bit cramped, you can adjust the UI scaling. Go to and look for the User Interface section. You can increase the font size specifically for the editor and responses, making those deep-nested JSON objects much more legible. The "Blacker" Dark Mode If you are using an OLED or AMOLED
While the app theme covers the UI, you can further customize syntax highlighting for code snippets by editing internal Postman files, though this is advanced and not officially supported. Go to and look for the User Interface section
Cmd + Shift + L (This usually toggles between light and dark modes). Windows/Linux: Ctrl + Shift + L . Taking it Further: Customizing the Appearance
If your "long report" is actually a custom Postman Visualizer table, text might become illegible in dark mode if colors aren't specified. You can fix this by adding custom CSS (e.g., body { color: #fff; background-color: #1a1a1a; } ) directly into your Visualizer script.
To enable or customize the dark theme for reports and the interface in Postman, you can use the built-in settings or specialized reporting tools. To apply the dark theme across the entire application: