The initial CSS keyword applies the initial value of a property to an element. It can be applied to any CSS property, including the CSS shorthand all.
On inherited properties, the initial value may be surprising. You should consider using the inherit, unset, or revert keywords instead.
Example
HTML
<p> <span>This text is red.</span> <em>This text is in the initial color (e.g., black).</em> <span>This is red again.</span> </p>
CSS
p {
  color: red;
}
em {
  color: initial;
}
Specifications
| Specification | Status | Comment | 
|---|---|---|
| CSS Cascading and Inheritance Level 4 The definition of 'initial' in that specification. | Working Draft | No changes from Level 3. | 
| CSS Cascading and Inheritance Level 3 The definition of 'initial' in that specification. | Candidate Recommendation | Defines what an initial value is. | 
| CSS Values and Units Module Level 3 The definition of 'initial' in that specification. | Candidate Recommendation | Defines the keyword. | 
Browser compatibility 
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) | 
|---|---|---|---|---|---|
| Basic support | 1.0 | 3.5 (1.9.1)-moz[1] 19.0 (19.0) | No support | 15.0 | 1.2 | 
| Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|
| Basic support | 1.0 | 1.0 (1.9.1)-moz[1] 19.0 (19.0) | No support | No support | (Yes) | 
[1] From Firefox 1.0 onward, increasing support for -moz-initial was added in each version, culminating with the support for quotes in Firefox 3.5 (Gecko 1.9.1). The last addition was support for the non-standard -moz-border-*-colors in Firefox 3.6 (Gecko 1.9.2). Support for the prefixed -moz-initial keyword has been removed as of Firefox 24 in favor of the unprefixed initial keyword.
See also
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