January 18, 2026

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Does AO3 Have Dark Mode?

5 min read

The Archive of Our Own, or AO3, is one of the most beloved fanfiction platforms on the internet. With a vast repository of user-submitted works, it appeals to readers and writers across every conceivable fandom. One common question among users, especially those who browse at night or prefer darker themes for aesthetic or comfort reasons, is whether AO3 has a dark mode.

TL;DR

Yes, AO3 does offer dark mode options, but not in the way most modern websites do. Instead of a simple toggle switch, users need to choose a different “skin” via the site’s settings. Some third-party browser extensions also allow dark mode functionality. While not intuitive at first glance, these customization tools effectively give users the dark reading experience they want.

How AO3 Handles Dark Mode

Unlike many modern apps and websites that feature a quick toggle for dark mode, AO3 approaches things a bit differently. The platform uses a system of customizable layouts called site skins. These skins don’t just change the color of text and backgrounds — they can alter how nearly every element on the site looks.

To activate a dark-themed interface, users must choose an existing skin that incorporates dark mode styling or create one of their own. This flexibility is highly valued among the AO3 community, but it can be daunting for first-time users unfamiliar with customization settings.

How to Enable Dark Mode on AO3

If you’re looking to enable a dark mode on AO3, there are a few methods available:

1. Using AO3’s Built-in Skins

AO3’s in-site customization lets users select and apply site skins that change everything from font style to background color. Here’s how you can switch to a dark skin:

  1. Log into your AO3 account.
  2. Go to your Dashboard or My Settings.
  3. Select Skins under the preferences section.
  4. Choose from public skins. Several user-created skins like Reversi, Dark Skin, or Autumn Night provide dark mode functionality.
  5. Select Use on your skin of choice and save the changes.

After this, the site’s appearance will adjust to the selected style, including any dark mode properties it includes.

2. Install a Browser Extension

For users who don’t want to navigate AO3’s skin system, browser extensions can offer a simple solution. These tools apply a dark theme across many sites, including AO3, without manual skin configuration.

Popular browser extensions include:

  • Dark Reader (Chrome, Firefox): Automatically converts bright sites into dark mode versions, including AO3.
  • Midnight Lizard: Offers customizable themes with contrast, hue, and brightness controls.
  • Stylus: Allows for the installation of custom CSS themes specifically made for AO3.

Pros and Cons of AO3’s Dark Mode Options

Pros:

  • Highly customizable: AO3’s skins provide endless personalization, from aesthetics to usability.
  • User-contributed variety: Hundreds of shared skins mean there are many dark mode styles to choose from.
  • Third-party compatibility: Dark mode is easy to implement via external browser tools.

Cons:

  • Not beginner-friendly: Users unfamiliar with CSS or custom settings may struggle to find and apply a suitable skin.
  • No native toggle: Unlike other platforms, AO3 doesn’t offer a one-click dark mode option in its interface.
  • Inconsistent support: Some skins may be outdated or not optimized for newer content formatting.

How to Create Your Own Custom Dark Skin

If the available public dark skins don’t suit your preferences, AO3 allows you to create custom skins. This option is ideal for users with CSS knowledge, offering complete control over how the site renders.

Steps for creating a custom skin:

  1. Go to My Skins under your account settings.
  2. Click Create Site Skin.
  3. Fill in the name and description fields.
  4. Paste or write your custom CSS code in the provided field — making sure to set dark background and light text.
  5. Preview and adjust until you’re happy; then save and apply.

This approach gives advanced users total freedom, allowing them to match AO3’s presentation with their personal styles or accessibility needs. Multiple online forums and Reddit threads offer shared CSS templates you can start with.

Accessibility Considerations

Dark mode isn’t just a matter of preference for many users — it’s an accessibility tool. People with light sensitivity, visual impairments, or chronic migraines often need reduced brightness to comfortably interact with websites. AO3’s flexible skin system, while more intricate than a simple toggle, accommodates these users’ needs in a thoughtfully customizable way.

Community Contributions and Popular Dark Skins

As with much of AO3’s content, the community drives the innovation behind its dark mode options. Some of the most recommended public skins include:

  • Reversi: Offers a smooth dark theme with clean font choices.
  • Modern Noir: Known for excellent contrast and aesthetics for prolonged reading sessions.
  • Low Light AO3: Prioritizes ease of reading with minimal eye strain.

These can be selected under the “Public Skins” section, where users can preview them before applying.

Conclusion

AO3 may not have a native dark mode switch, but it offers powerful tools for those willing to explore its customization features. Whether through built-in skins or browser add-ons, users have several options for creating a dark-themed experience that suits both aesthetic preferences and accessibility requirements. While this system might require a bit of extra learning for newcomers, the flexibility it provides is immense and represents yet another facet of AO3’s community-driven platform ethos.

FAQ

  • Q: Does AO3 have a built-in dark mode switch?
    A: No, AO3 does not include a native toggle switch. Dark mode is enabled using site skins or browser extensions.
  • Q: Is it easy to switch to a dark skin on AO3?
    A: It’s straightforward once you know where to look. You just need to log in, go to the Skins section, and select a public or custom skin.
  • Q: Can I use browser extensions for dark mode on AO3?
    A: Yes, extensions like Dark Reader or Stylus allow you to enable dark mode across websites, including AO3.
  • Q: Can I create my own dark mode skin?
    A: Yes, AO3 lets you write and upload your own CSS-based skin for full customization.
  • Q: Are dark mode skins available for mobile users too?
    A: If you’re accessing AO3 through a mobile browser that supports extensions or custom themes, then yes. However, mobile customization is more limited.