Hello,
Thank you very much for choosing our theme and for contacting us.
By default, the row settings of the Header builder have “dark” and “light” colors: https://xtemos.com/docs-topic/header-rows-and-columns-configuration/
You can also change the font by means of the Advanced typography option, which allows you to choose the item from a drop-down or insert your custom CSS class. Please navigate to the Theme Settings > Typography > Advanced Typography.
Here is the documentation providing more detailed instructions: https://xtemos.com/docs/woodmart/advanced-typography-settings/
Best Regards