How to add a color stripe under main navigation bar?

Hi there,

Any chance you can link us to the page in question?

You can use the private information field:
https://docs.generatepress.com/article/using-the-premium-support-forum/#private-information

Let me know :)

https://www.indiajobinfo.com/

I want to add a color stripe under the navigation bar like in this image.

Try this CSS:

.site-header {
    border-bottom: 5px solid #000;
}

Adding CSS: https://docs.generatepress.com/article/adding-css/

Thank you.. works perfectly.

No problem :)