CSS - Transparent background only

style.scss

// Background image
.logo-section {
        min-height: 250px;

        &::after {
            content: "";
            background: url(keyboard-886462_1920.jpg) no-repeat center center;
            @include background-cover;
            opacity: 0.5;
            top: 0;
            left: 0;
            bottom: 0;
            right: 0;
            position: absolute;
            z-index: -1;
        }
    }

// Background colour
background-color: rgba(208,170,87,0.5);