Line undearneath banner

Hi,

I require a navy blue line to seperate header from content below. It needs to stay the same across all pages.

I have attached an example how it should look like. I am unsure how to code to get the line at this part of the website.

Can you share link to your site? We can check easier.

8 hours ago, tuanphan said:

Can you share link to your site? We can check easier.

https://www.interiorsbyhonor.com/

 Add to Home > Design > Custom CSS

.header-announcement-bar-wrapper:after {
    content: "";
    display: block;
    background: black;
    width: 100%;
    height: 1px;
}