Add color behind header (slider) text

Hi bros. I thought that could be cool to add a color stripe behind the text in the header image slider like the other widgets but I didn’t find the option.
Is it possible?

Hello,

Can you please provide some explanatory screenshots?

You can upload screenshots to your WordPress Media Library and share a link, or you can use one of the online screenshot services.

Kind Regards, Roman.

Hi, Roman.
And here we go: I mean something like from “A” to “B”: http://www.economiaspiegatafacile.it/wp-content/uploads/2016/10/Schermata-2016-10-17-alle-14.18.06.png

Okay, thank you for the screenshot, can you also provide a link to your website to let me inspect it?

Kind Regards, Roman.