text-shadow

Sumário

A propriedade text-shadow acrescenta sombras ao texto. Ela aceita uma lista de sombras separadas por vírgula que serão aplicados ao texto e ao text-decorations do elemento.

Cada sombra é especificada como um deslocamento do texto, juntamente com valores opcionais de cor e raio de desfoque.

Multiplas sombras são aplicadas de frente-para-trás, com a primeira sombra especificada no topo.

Esta propriedade se aplica a ambos ::first-line e ::first-letter pseudo-elements.

Sintaxe

/* deslocamento-x | deslogamento-y | raio-de-desfoque | cor */
text-shadow: 1px 1px 2px black; 

/* cor | deslocamento-x | deslocamento-y | raio-de-desfoque */
text-shadow: #CCC 1px 0 10px; 

/* deslocamento-x | deslogamento-y | cor */
text-shadow: 5px 5px #558ABB;

/* cor | deslocamento-x | deslocamento-y */
text-shadow: white 2px 5px;

/* deslocamento-x | deslocamento-y
/* Usa o padrão para cor e raio-de-desfoque */
text-shadow: 5px 10px;

/* Valores globais */
text-shadow: inherit;
text-shadow: initial;
text-shadow: unset;

Valores

<cor>

Optional. Pode ser especificado tanto antes quanto depois dos valores de deslocamento. Se a cor não é especificada, uma cor UA-chosen será usada. 

Note: Se voce quer garantir a consistencia entre os navegadores, especifique explicitamente uma cor.

<offset-x> <offset-y>

Required. These <length> values specify the shadow's offset from the text. <offset-x> specifies the horizontal distance; a negative value places the shadow to the left of the text. <offset-y> specifies the vertical distance; a negative value places the shadow above the text. If both values are 0, then the shadow is placed behind the text (and may generate a blur effect when <blur-radius> is set).
To find out what units you can use, see <length>.

<blur-radius>

Optional. This is a <length> value. If not specified, it defaults to 0. The higher this value, the bigger the blur; the shadow becomes wider and lighter.

Formal syntax

none | <shadow-t>#
where 
<shadow-t> = [ <length>{2,3} && <color>? ]
where 
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>
where 
<rgb()> = rgb( <rgb-component>#{3} )
<rgba()> = rgba( <rgb-component>#{3} , <alpha-value> )
<hsl()> = hsl( <hue>, <percentage>, <percentage> )
<hsla()> = hsla( <hue>, <percentage>, <percentage>, <alpha-value> )
<named-color> = <ident>
<deprecated-system-color> = ActiveBorder | ActiveCaption | AppWorkspace | Background | ButtonFace | ButtonHighlight | ButtonShadow | ButtonText | CaptionText | GrayText | Highlight | HighlightText | InactiveBorder | InactiveCaption | InactiveCaptionText | InfoBackground | InfoText | Menu | MenuText | Scrollbar | ThreeDDarkShadow | ThreeDFace | ThreeDHighlight | ThreeDLightShadow | ThreeDShadow | Window | WindowFrame | WindowText
where 
<rgb-component> = <integer> | <percentage>
<alpha-value> = <number>
<hue> = <number>

Exemplos

.red-text-shadow {
   text-shadow: red 0 -2px;
}

<p class="red-text-shadow">
   Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo 
   inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
</p>

.white-with-blue-shadow {
   text-shadow: 1px 1px 2px black, 0 0 1em blue, 0 0 0.2em blue;
   color: white;
   font: 1.5em Georgia, "Bitstream Charter", "URW Bookman L", "Century Schoolbook L", serif;
}

<p class="white-with-blue-shadow">
   Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore 
   veritatis et quasi architecto beatae vitae dicta sunt explicabo.
</p>

.gold-on-gold {
   text-shadow: rgba(0,0,0,0.1) -1px 0, rgba(0,0,0,0.1) 0 -1px,
   rgba(255,255,255,0.1) 1px 0, rgba(255,255,255,0.1) 0 1px,
   rgba(0,0,0,0.1) -1px -1px, rgba(255,255,255,0.1) 1px 1px; 
   color: gold;
   background: gold;
}

<p class="gold-on-gold">
   Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore 
   veritatis et quasi architecto beatae vitae dicta sunt explicabo.
</p>

Especificações

Compatibilidade do navegador

[1] Gecko (Firefox) theoretically supports infinite text-shadows (don't try it). Gecko 2 and later cap the blur radius at 300 for performance reasons. If the <color> value is unspecified, then Gecko uses the value of the element's color property.

[2] Opera supports a maximum of 6-9 text-shadows for performance reasons. The blur radius is limited to 100px. Opera 9.5-10.1 adheres to the old, reverse painting order (CSS2, the first specified shadow is on the bottom).

[3] Internet Explorer 5.5 supports Microsoft's Shadow and DropShadow Filter.

[4] Safari: Any shadows that do not explicitly specify a color are transparent. Safari 1.1-3.2 only supports one text-shadow (displays the first shadow of a comma-separated list and ignores the rest). Safari 4.0 (WebKit 528) and later support multiple text-shadows. Konqueror supports text-shadow starting with version 3.4.

Veja também

• box-shadow