Whoever sees this help

p {
background: rgba(255, 255, 255, .6);
}

You may need to mess around inspecting your page to find the element (the p part) you want depending on what text you're trying to highlight.
You can google the rbg levels of another color if you don't want a white highlight too. The .6 is going to be the level of transparency (1 is 100%, .6 would be 60%). Good luck and lmk if I can help :)

i can help

find where it says background: url("background url here") and just insert the address of your background inside the (" ") :D