Revert to the Default Theme

1: Go to Settings > Chat Settings.

2: Choose one of the default themes in the list at the top and click on it.

3: The theme should now be applied!

See also:

• How do I set a new theme?
• How do I create a new theme?

To contact Telegram support, go to Settings, and scroll down until you see the 'Ask a Question' button at the bottom.

If you want to join us, check out the Telegram Support Initiative.