Howto fill up the transparent Button in the Parallax Widget (e.g. the Left one)

Hi dear Support,
Iám getting nuts, I´ve tried a zillion of css codes but the best I achieved eas to change the Border Color. But I want to fill it up, or at least change the Textcolor of the Buttons.
I use the Full Backround Mode and the BG is very light and the White Color of the Buttontext makes it almost invisible.
Please Help.



Hello there,

I hope you are doing well today.

You can use the following CSS code to add a background color to the button by going to Appearance > Customize > Additional CSS and pasting it there.

.btn-white, .image-bg .btn, .image-bg .btn:visited {
    color: black;
    border-color: black;
    background: red;

Best Regards,