Postman Dark Theme [new]
You can specify the dark theme directly when running your collection by using the following flag: newman run -r htmlextra --reporter-htmlextra-darkTheme 3. Common Issues & Customizations
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. postman dark theme