Slack dark mode and light mode on an iPhone

Slack offers a built-in dark mode on iPhone, iPad, and Android. Here’s how to enable it with a few quick taps and use a darker interface. This can even save power if you have a phone with an OLED display.

To enable dark mode in Slack, tap the menu icon at the top right corner of the Slack app—it looks like three vertical dots. It’s in the same place on Slack for iPhone, iPad, and Android.

Open side menu in Slack on iPhone

Tap “Settings” in the menu panel.

Open Settings screen from sidebar menu in Slack on iPhone

Tap the “Dark Mode” option here. On iPhone or iPad, tap the switch to the right of Dark Mode to quickly toggle it on or off.

Option to enable Dark Mode enabled in Slack on iPhone

On Android, scroll down to the General section and tap the “Dark Mode” option. Slack will prompt you to restart your Slack app to apply the change, for some reason.

To disable Dark Mode, return here and tap the same option.

Slack Dark Mode option enabled in Settings on an Android phone

Note that Slack synchronizes your normal Slack theme between your devices. That’s why your sidebar may not be dark—even in dark mode. Customize your Slack sidebar color and select a dark theme to get it darker.

RELATED: How to Change Slack’s Annoying Purple Sidebar Color

Slack doesn’t yet offer a dark mode for its desktop applications—Windows, macOS, Linux, and the web application—but the company promises it’s working on one.

Slack on iPhone showing a channel with dark mode enabled

Like all dark modes, this isn’t for everyone—but we still love dark mode.

RELATED: Dark Mode Isn’t Better For You, But We Love It Anyway

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Chris Hoffman is Editor-in-Chief of How-To Geek. He's written about technology for over a decade and was a PCWorld columnist for two years. Chris has written for The New York Times and Reader's Digest, been interviewed as a technology expert on TV stations like Miami's NBC 6, and had his work covered by news outlets like the BBC. Since 2011, Chris has written over 2,000 articles that have been read more than one billion times---and that's just here at How-To Geek.
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