Top narrow bar above the main header
In this article:
How can I change the top bar & header background color?
In the theme customizer, go to the Header section and scroll to the
βTop bar or Main header subsection.Click the color palette icon to select from the list of options.
You can click the (+) button to type in a Hex code or to use the slider.
How can I change the phone number and email address in the top bar?
In the BigCommerce dashboard, go to Store Setup > Store Profile.
Enter the email, and phone number in the fields provided.