How to Enable a Dark Mode Toggle on Your Squarespace Site (Without Losing Your Mind)

Your site looks gorgeous. But at 11 p.m., on a glowing white screen, it’s basically a flashlight to the face.

And your visitors? They’re tired. Their eyes are done. Their phone’s on dark mode. The app they just used was dark mode. The OS is in dark mode. Then they land on your site and boom. Retinal assault.

Squarespace doesn’t offer built-in dark mode. Annoying. But it doesn’t mean you’re stuck. You can still add a working, stylish, fully customizable toggle that gives users control over their viewing experience-without hiring a developer or downloading sketchy third-party junk.

This isn’t a “nice to have.” It’s expected.

Modern users look for it.

Design-conscious brands offer it.

And accessibility-conscious creators should.

Let’s build it.

How to Add a Dark Mode Toggle in Squarespace

1. Open Your Custom CSS Settings

Go to Design > Custom CSS. This is where you’ll write the style rules for your dark mode.

2. Paste in the Dark Mode Styles

Here’s your base:

css

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body.dark-mode {

  background-color: #121212;

  color: #f0f0f0;

}

body.dark-mode a {

  color: #88ccff;

}

You can add more for headers, buttons, menus-just target them with .dark-mode versions of your site styles.

3. Add the Toggle Button + Script

Go to Settings > Advanced > Code Injection > Header and paste this:

html

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4. Preview and Style It

Test your toggle. Adjust font colors, buttons, icons-anything that looks off. Make sure the toggle doesn’t block important content on mobile.

5. Keep It Consistent

Use dev tools or the Squarespace editor to polish every detail-like hover states, buttons, or even image overlays that clash in dark mode.

Conclusion: This Is More Than a Button

That little moon icon in the corner? It does more than flip colors.

It tells your users you respect their experience. You value accessibility. You understand they’ve been staring at bright screens for ten hours already and just want a moment of calm.

And once you add that dark mode toggle, something changes.
Your site feels smarter.
More alive.
More thoughtful.
Less cookie-cutter.

You didn’t wait for Squarespace to hand you a feature. You built one. You made your site responsive and not just to screens, but to people.

And that tiny button, sitting quietly in the bottom corner, gives your users a choice they didn’t know they needed, but instantly appreciate.

So take the 10 minutes. Add it. Style it. Test it.
You’ll never go back.
And neither will your audience.