Yes, you can change the background color of your header and footer in the Themes section of the Settings tab. 

1. From the Navigation toolbar, click Settings.
   

2. Select Header and footer under Customization.
   

3. Click the Edit icon beside the theme you want to apply. 
   

4. Choose the Header or Footer tab. 
   

5. Click the Background icon to select another color. Click Save and proceed.