Full width header

Hi there,
I am trying to recreate https://omgcheckitout.com/ header, so that it will be stretched to the full width of the page.
Also, I am trying to change the color of it to be white, and the navigation links to be black with the red underline on hover.
Could you please tell me if it is a built option of the newspaper’s theme?

Thanks in advance

figured out the color thing, still struggling with the full width

Ok nevermind 🙂 it’s done