Step 1: Navigate to Appearance from your admin dashboard then click Customize. Next, hit Header. You can see a list of options where you can customize your header styles.
Step 2: Click on the section you want to customize.
Select Style to edit font, size, color.
Select Background to edit the header background color.
Select Spacing, Border to control the space and border settings.
Note: If you have imported the demo, you will not be able to see the changes you made because the page already had a fixed header style. For your convenience, refer to the following list to find the corresponding header style of each page.
Step 3: After customizing, do not forget to click Publish button to save your changes.