background color blue opacity css code example
Example 1: css opacity example
.opacity30 {
opacity: 0.3;
filter: alpha(opacity=30); /* For IE8 and earlier */
}
Example 2: rgba green color
rgb(0,128,0) /*green*/ Hex #008000
Example 3: 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;
}