Change your Slack theme

To change the colour of your workspace, choose a new theme or create your own custom theme.

Tip: If you’d like a darker look for Slack, learn how to turn on dark mode from your preferences.

Choose a new theme

If you use multiple workspaces, try selecting a different theme for each one to help you quickly tell them apart. Your new theme will appear whenever you open that workspace on any device or in your browser.

  1. From your desktop, click on your profile picture in the top right.
  2. Select Preferences.
  3. Click Themes.
  4. Below Colours, select a theme.

Note: When you have dark mode turned on, the existing options for sidebar themes will look different (and darker) than they do in light mode. Custom themes will look the same in light and dark mode.

Tip: In your Themes preferences, you'll find accessible themes that some people with colour-blindness have found helpful.

Customise your theme

  1. From your desktop, click on your profile picture in the top right.
  2. Select Preferences.
  3. Click Themes.
  4. Below Colours, click Create a custom theme. Enter any six-digit HTML colour value, or click a colour swatch to choose from the colour picker.

Custom theme input fields with a colour picker


Share a custom Slack theme

Your custom theme will only be visible to you, but you can share it with other colleagues by clicking the Copy button below Copy and paste these values to share your custom theme with others. Paste your theme into any channel or direct message, and members can click the Switch sidebar theme button from their desktop to start using it.

Tip: When you paste any six-digit colour value into Slack, we’ll display a small swatch for each colour. 🎨✨

Change the appearance of your workspace by choosing a new theme, or create a custom theme with the colours of your choice.

Tip: If you’d like a darker look for Slack, you can turn on Dark mode from your preferences.


Choose a new theme

If you use multiple workspaces, try selecting a different theme for each one to help you tell them apart. Your new theme will appear whenever you open Slack on any device or in your browser.

  1. From your desktop, click your profile picture in the sidebar.
    Static image of a cursor clicking the profile picture menu in the Slack app
  2. Select Preferences from the menu.
  3. Click Themes.
  4. Below Slack themes, select an option.

Note: Some people with colour blindness have found our vision assistive themes helpful. We’re always working to make Slack more accessible and listening to feedback about how we can improve themes.


Create a custom theme

Set custom colours

  1. From your desktop, click your profile picture in the sidebar.
    Static image of a cursor clicking the profile picture menu in the Slack app
  2. Select Preferences from the menu.
  3. Click on Themes, then select Custom theme.
  4. For each element, select a swatch from the colour picker.
  5. Click on the   close icon, then click on Save changes.


Share your theme

Your custom theme will only be visible to you. If you’d like to showcase it, you can share your colour selection with others.

  1. From your desktop, click your profile picture in the sidebar.
    Static image of a cursor clicking the profile picture menu in the Slack app
  2. Select Preferences from the menu.
  3. Click on Themes, then select Custom theme.
  4. Next to Theme colours, click on   Share to copy your theme.
  5. Navigate to any conversation and paste your theme into a message, then press Enter to send it. Any member of that conversation can select Apply Slack theme to use it themselves.


Import your legacy theme

To apply the colours from the theme that you last used before Slack was updated to the new design, you can import your legacy theme.

  1. From your desktop, click your profile picture in the sidebar.
    Static image of a cursor clicking the profile picture menu in the Slack app
  2. Select Preferences from the menu.
  3. Click on Themes, then select Custom theme.
  4. Next to Theme colours, click   Import theme.
  5. Click on Paste your legacy theme colours, then click on Apply.


Set theme preferences 

You can set two other preferences to further adjust the look of your theme:

  • Window gradient
    Decide whether your windows are a solid colour or have a gradient.
  • Darker sidebars
    By default, some themes have a darker sidebar. If you pick a theme with a light sidebar, you can adjust the contrast with the Darker sidebars preference.
  1. From your desktop, click your profile picture in the sidebar.
    Static image of a cursor clicking the profile picture menu in the Slack app
  2. Select Preferences from the menu.
  3. Click on Themes, then click on Custom theme.
  4. Tick the box next to the preference(s) that you’d like to set, then click Save.

Tip: On certain Mac devices, you can turn window transparency off from the Accessibility section of your preferences.