css transparency code example

Example 1: css transition opacity

/* Answer to: "css transition opacity" */

/*
  CSS transitions allows you to change property values smoothly,
  over a given duration.
*/

.myClass {
  vertical-align: top;
  transition: opacity 0.3s; /* Transition should take 0.3s */
  -webkit-transition: opacity 0.3s; /* Transition should take 0.3s */
  opacity: 1; /* Set opacity to 1 */
}

.myClass:hover {
  opacity: 0.5; /* On hover, set opacity to 2 */
}

/* 
  From `opacity: 1;` to `opacity: 0.5;`, the transition time should
  take 0.3 seconds as soon as the client starts to hover over the
  element.
*/

Example 2: css opacity background color

background: rgba(255, 255, 255, 0.25);

Example 3: css opacity example

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

Example 4: css opacity

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

Example 5: background color with opacity

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

Example 6: opacity css

div {
  background-color: yellow;
}

.light {
  opacity: 0.2; /* Der Text kann kaum über dem Hintergrund gelesen werden */
}

.medium {
  opacity: 0.5; /* Der Text ist besser über dem Hintergrund lesbar */
}

.heavy {
  opacity: 0.9; /* Der Text ist sehr deutlich über dem Hintergrund lesbar */
}