css opaque code example

Example 1: css opacity example

.opacity30 {
  opacity: 0.3;
  filter: alpha(opacity=30); /* For IE8 and earlier */
}

Example 2: css opacity

.div{
  opacity: 0.8; /* 1 means fully visible, 0 means invisible */
}

Example 3: background color with opacity

h1 {background-color:rgba(255,0,0,0.3);}