transparent background color div css code example
Example 1: background color with opacity
h1 {background-color:rgba(255,0,0,0.3);}
Example 2: transparent background css
div {
width: 200px;
height: 200px;
display: block;
position: relative;
}
div::after {
content: "";
background: url(image.jpg);
opacity: 0.5;
top: 0;
left: 0;
bottom: 0;
right: 0;
position: absolute;
z-index: -1;
}