Try using a browser developer tool to find this stuff out. Chrome’s built-in developer tool is the one I use.
It exposes the CSS applied to elements, like the blue box you’re referring to, so that you know what CSS you need to use in your Custom CSS.
See: https://snag.gy/Ng437.jpg ?
On the developer toolbar it shows the HTML to the left, and CSS to the right. Seeing that CSS should be sufficient enough to indicate the CSS you need to use. You’ll need to apply the CSS to this:
.featured-text .featured-title
Use this CSS generator to create the CSS you need to use to create that transparency effect: https://www.css3maker.com/css-3-rgba.html
Then copy the code generated and put it into your Custom CSS along with that CSS exposed by Chrome’s developer tools:
.featured-text .featured-title
To make something like this:
.featured-text .featured-title {
background-color: rgba(215, 44, 44, 0.7);
background: rgba(215, 44, 44, 0.7);
color: rgba(215, 44, 44, 0.7);
}
Edit:
You don’t actually need the ‘color
‘ styling, if you don’t want to change it. So, your style would be something like this (with ‘color
‘ removed):
.featured-text .featured-title {
background-color: rgba(215, 44, 44, 0.7);
background: rgba(215, 44, 44, 0.7);
}