You can customize the Header Style as you like. Follow Theme Options > Theme Settings. Here from the Header tab click Header Option and the header style button field will appear.
Header Background Color: Set Header Background Color.
Sticky Header Background Color: Set Sticky Header Background Color.
Header Search Icon: Enable Header Search Icon.
Header Search Icon Color: Set the header search icon color.
Sticky Header Search Icon Color: Set the sticky header search icon color.
Click Save Changes to save theme options. Click Reset Section to reset only this section. Click Reset All to reset all theme options.