Overlay a layer

.et_pb_pricing_heading:before {
    content: ”;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .6);
}
.et_pb_pricing_heading > * {
    position: relative;
}

http://bedrockcrossfit-gw.flywheelsites.com/get-started-3