To remove the background make this adjustment. You can also choose to just change the 4th rgba value to “0”
#prompt-background {> background: none;
url(“{{ ‘age-check-background.jpg’ | asset_url }}”) no-repeat center center fixed rgba(0,0,0,0.5);>-webkit-background-size: cover;>-moz-background-size: cover;>-o-background-size: cover;>background-size: cover;> width: 100%;> height: 100%;> position: fixed;> left: 0;> top: 0;> z-index: 9999999;> }