CSS3 throws its full weight behind text shadows, which as the name suggests, lets you add shadows to regular text on the page. And with support for multiple shadows simultaneously applied to the same text, CSS text shadows can produce some stunning textual effects without images. The following is the syntax for CSS3 text shadows:

Whereby:

* offsetx: The horizontal offset of the shadow (in any valid CSS unit) relative to the text. A negative value places the shadow to the left of the text.
* offsety: The vertical offset of the shadow (in any valid CSS length unit) relative to the text. A negative value places the shadow to the top of the text.
* blur-radius*: Optional value to set the strength of the blue (in any valid CSS length unit). Defaults to 0 if not specified. A large blur-radius value
* color*: Optional value to set the color of the shadow. The value can be defined either at the start or very end of text-shadow. Defaults to the UI color if not specified.

Note: Values with asterisks following them (*) denote they are optional.

Here are a couple of very basic examples:

Basic Shadow:

Shadow with text color set to match closely the document's background color:

This example sets the color of the text to match closely the document background's color (white in this case), causing the shadow to define the outer edges of the text.

Inset (aka Letterpress) Text Shadow:

This example sets out to create inset text, or text that appears slightly pressed into the background. There are a few ways to achieve the look, but one ways is to define just a y shadow offset (leaving the x shadow offset to 0) while specifying a shadow color that's lighter than the text's font color.

Here's a more dramatic example done against a dark background:

Multiple text shadows can be applied to the same element simultaneously, which can make for some interesting effects. To add multiple text shadows to an element, just separate each text shadow definition with a comma within the same text-shadow property, for example:

The point of the above example is just to highlight how two shadows (or more) can be simultaneously added to a text element, each with its own offsets and color. With that said, lets see a couple of more compelling multiple text shadow examples.

3D looking Text Shadow:

In this example, multiple shadows of the same color are added to a text element, each shadow offset a few pixels more compared to the previous. This creates the illusion of 3D looking text:

Notice how the very first shadow's color is set to black, to give the text a nice outline.

Glowing Text Shadow:

You can create "glowing text" by using multiple text shadows that do NOT offset at all from the foreground text, essentially hiding behind the text. By gradually increasing the blur strength of each compounding shadow plus darken its color, you create the "glow" effect:

Amazing what some seemingly simple text shadows can do!

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