Dark-mode simulator
Model how Apple Mail, Gmail, and Outlook each render dark mode, using CIELAB color-space math. Images are never inverted. Available on Pro and above.
Pro plan feature
Mail clients treat dark mode differently, and Proofel models each one. Use the light/dark toggle above the email, then pick a client. Apple Mail honors your authored dark-mode CSS with a gentle partial inversion; Gmail and Outlook force a full color inversion. The simulation uses CIELAB color-space math so the preview matches what those clients actually do to your colors. Images are never inverted.
A simulator is an approximation. For anything critical, always test on a real device too. The dark-mode simulator is available on Pro and above.
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