customize header color to be the same across all pages regardless of color of first block on page

Hi! I am wondering if it is possible to customize the header color to be the same across all pages regardless of color of first block on page. I know that the header color is controlled by the color of the first block. I am trying to make the header the same color across all pages without it being changed by the color of the first block.

The all green picture is what color I want the header to be on each page. The other picture shows my site logo with the header color based on the first block. That is when i would want to header color to be that green color but still keep the first block tan.

You can set the header to solid and pick a colour theme for it, then it'll stay the same colour on every page.