Change back Gmail default theme. We comfortable to use Gmail mail our recognize interface. You can back Gmail default theme. Learn how to change back Gmail default theme.
1. Sign in Gmail account and open Gmail email inbox page.
2. Slick settings icon right sight of your Gmail mail inbox page.
- You will see more buttons then click Themes button to get Gmail default theme.

3. You will see Gmail all themes. Click Light text with picture to change Gmail default theme.

4. After that you will see your Gmail interface will change at Gmail default theme.