Header background is gray when Breadcrumbs Bar set to none.

Hello again.

Why does the background of the header turn gray when the Breadcrumbs Bar is set to NONE?

I was expecting the background behind the main menu + logo area to remain white to give it a nice contrast with the light gray content box. Is there a way to make the header background stay white?

I don’t see any theme options for configuring this under GENERAL OPTIONS / HEADER OPTIONS.

Custom css is required for this?

Thanks.