Header V2 is a pre-configured header layout of Konte. To select it, simply go to Customize > Header > Header Layout and select Prebuilt Header as Header V2. With all header layouts, you can select the header background, text color, and set the height in the Customizer. In addition, the Topbar can be configured separately.

This header layout only supports the Header Main section. You can set the header main's height and background in Customize > Header > Header Main.