box-shadow

Syntax#

box-shadow: none|h-shadow v-shadow blur spread color |inset|initial|inherit;

Parameters#

Parameters	Details
inset	by default, the shadow is treated as a drop shadow. the inset keyword draws the shadow inside the frame/border.
offset-x	the horizontal distance
offset-y	the vertical distance
blur-radius	0 by default. value cannot be negative. the bigger the value, the bigger and lighter the shadow becomes.
spread-radius	0 by default. positive values will cause the shadow to expand. negative values will cause the shadow to shrink.
color	can be of various notations: a color keyword, hexadecimal, `rgb()`, `rgba()`, `hsl()`, `hsla()`
## Remarks#
Browser Support:

Chrome 10.0
IE 9.0
Firefox 4.0 3.5 -moz
Safari 5.1 3.1 -webkit-
Opera 10.5

drop shadow

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  -webkit-box-shadow: 0px 0px 10px -1px #444444;
     -moz-box-shadow: 0px 0px 10px -1px #444444;
          box-shadow: 0px 0px 10px -1px #444444;
}

inner drop shadow

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  background-color: #1C90F3;
  width: 200px;
  height: 100px;
  margin: 50px;
  -webkit-box-shadow: inset 0px 0px 10px 0px #444444;
     -moz-box-shadow: inset 0px 0px 10px 0px #444444;
          box-shadow: inset 0px 0px 10px 0px #444444;
}

Result:

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/1/

bottom-only drop shadow using a pseudo-element

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/2/

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  background-color: #1C90F3;
  width: 200px;
  height: 100px;
  margin: 50px;
}

.box_shadow:after {
  content: "";
  width: 190px;
  height: 1px;
  margin-top: 98px;
  margin-left: 5px;
  display: block;
  position: absolute;
  z-index: -1;
  -webkit-box-shadow: 0px 0px 8px 2px #444444;
     -moz-box-shadow: 0px 0px 8px 2px #444444;
          box-shadow: 0px 0px 8px 2px #444444;
}

multiple shadows

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/5/

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  width: 100px;
  height: 100px;
  margin: 100px;
  box-shadow:
    -52px -52px 0px 0px #f65314,
    52px -52px 0px 0px #7cbb00,
    -52px 52px 0px 0px #00a1f1,
    52px 52px 0px 0px #ffbb00;
}