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Email Dark Mode Preview

Preview how your email HTML renders in dark mode vs light mode. Test two simulation methods side by side to catch color inversion issues before sending.

About this tool

Dark mode adoption has grown rapidly, with over 80% of smartphone users enabling it. Email clients like Apple Mail, Gmail, and Outlook each handle dark mode differently, often inverting colors in unexpected ways. Testing your email in dark mode before sending prevents readability issues, invisible text, and broken designs. Use this alongside our color contrast checker to ensure accessibility, and our dark mode preview to test across viewport widths. For proper email styling, our CSS inliner ensures your styles survive email client processing.

Frequently Asked Questions

How do email clients handle dark mode?

There are three main approaches: no color changes (Gmail on Android), partial inversion where only light backgrounds are darkened (Apple Mail), and full inversion where all colors are inverted (Outlook desktop). Each client may handle the same email differently, which is why testing is essential.

How can I prevent dark mode from breaking my email design?

Use the meta tag <meta name='color-scheme' content='light dark'> and <meta name='supported-color-schemes' content='light dark'> in your email head. Add inline styles with both light and dark color values. Use transparent backgrounds where possible, and avoid light text on white backgrounds since inversion will make both dark.

What is the CSS Filter simulation method?

The CSS filter method applies 'filter: invert(1) hue-rotate(180deg)' to simulate how some email clients invert colors. Images are re-inverted to appear normal. This closely mimics what Apple Mail and some Android clients do in dark mode.

What is the Color Override simulation method?

The color override method forces a dark background and light text on all elements, simulating how Outlook and some other clients completely replace your color scheme. This is a more aggressive transformation and helps you spot text that becomes invisible.

Which email clients support dark mode?

Apple Mail (iOS and macOS), Gmail (Android and iOS), Outlook (Windows, Mac, iOS, Android), Yahoo Mail, and most modern email clients support dark mode. However, each implements it differently. Apple Mail has the most sophisticated dark mode handling.

Do I need to create separate dark mode email templates?

No. You can use a single template with proper dark mode support. Use the prefers-color-scheme CSS media query (supported by Apple Mail and some others) to define dark mode styles. For clients that do not support this, ensure your default colors work well when inverted.

What colors work best in both light and dark mode?

Medium-tone colors (not too light, not too dark) work best in both modes. Avoid pure white (#FFFFFF) backgrounds, use off-white (#F5F5F5 or similar) instead, as it darkens more gracefully. For text, avoid very light grays that might become invisible on dark backgrounds.

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