background opacity image css code example
Example 1: set background image opacity
#bg{
background-image: url('images/wood1.jpg');
opacity:0.2;
width:300px;
height:300px;
}
Example 2: background image opacity css
body::before{
content: "";
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
z-index: -1;
background-image: url(image.jpg); /*Put your image url*/
background-size: cover;
background-position: center;
opacity: 0.25; /*Value from 0.0 to 1.0*/
}