Is there a 'box-shadow-color' property?
CssBox ShadowCss Problem Overview
I have the following CSS:
box-shadow: inset 0px 0px 2px #a00;
Now I am trying to extract that color to make the page colors 'skinnable'. Is there any way of doing this? Simply removing the color, and then using the same key again later overwrites the original rule.
There doesn't seem to be a box-shadow-color
, at least Google turns nothing up.
Css Solutions
Solution 1 - Css
Actually… there is! Sort of. box-shadow
defaults to color
, just like border
does.
According to http://dev.w3.org/.../#the-box-shadow
> The color is the color of the shadow. If the color is absent, the used > color is taken from the ‘color’ property.
In practice, you have to change the color
property and leave box-shadow
without a color:
box-shadow: 1px 2px 3px;
color: #a00;
Support
- Safari 6+
- Chrome 20+ (at least)
- Firefox 13+ (at least)
- IE9+ (IE8 doesn't support
box-shadow
at all)
Demo
div {
box-shadow: 0 0 50px;
transition: 0.3s color;
}
.green {
color: green;
}
.red {
color: red;
}
div:hover {
color: yellow;
}
/*demo style*/
body {
text-align: center;
}
div {
display: inline-block;
background: white;
height: 100px;
width: 100px;
margin: 30px;
border-radius: 50%;
}
<div class="green"></div>
<div class="red"></div>
The bug mentioned in the comment below has since been fixed :)
Solution 2 - Css
No:
http://www.w3.org/TR/css3-background/#the-box-shadow
You can verify this in Chrome and Firefox by checking the list of computed styles. Other properties that have shorthand methods (like border-radius
) have their variations defined in the spec.
As with most missing "long-hand" CSS properties, CSS variables can solve this problem:
#el {
--box-shadow-color: palegoldenrod;
box-shadow: 1px 2px 3px var(--box-shadow-color);
}
#el:hover {
--box-shadow-color: goldenrod;
}
Solution 3 - Css
You could use a CSS pre-processor to do your skinning. With Sass you can do something similar to this:
_theme1.scss:
$theme-primary-color: #a00;
$theme-secondary-color: #d00;
// etc.
_theme2.scss:
$theme-primary-color: #666;
$theme-secondary-color: #ccc;
// etc.
styles.scss:
// import whichever theme you want to use
@import 'theme2';
-webkit-box-shadow: inset 0px 0px 2px $theme-primary-color;
-moz-box-shadow: inset 0px 0px 2px $theme-primary-color;
If it's not site wide theming but class based theming you need, then you can do this: http://codepen.io/jjenzz/pen/EaAzo
Solution 4 - Css
You can do this with CSS Variable
.box-shadow {
--box-shadow-color: #000; /* Declaring the variable */
width: 30px;
height: 30px;
box-shadow: 1px 1px 25px var(--box-shadow-color); /* Calling the variable */
}
.box-shadow:hover {
--box-shadow-color: #ff0000; /* Changing the value of the variable */
}
Solution 5 - Css
A quick and copy/paste you can use for Chrome and Firefox would be: (change the stuff after the # to change the color)
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
-khtml-border-radius: 10px;
-border-radius: 10px;
-moz-box-shadow: 0 0 15px 5px #666;
-webkit-box-shadow: 0 0 15px 05px #666;
Matt Roberts' answer is correct for webkit browsers (safari, chrome, etc), but I thought someone out there might want a quick answer rather than be told to learn to program to make some shadows.