CSS3 Tutorial (8): CSS3 Transparency Guide

CSS3 transparent...opaque...gradient...whatever you want to call it! Here are some guidelines for using CSS3 transparency with some examples.

In fact, firefox has supported this a long time ago, but IE has never supported it!
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The "opacity" statement is used to set the transparency of an element: layer, text, image, etc... An element with an opacity value of 1 is completely opaque, otherwise, A value of 0 is completely transparent and invisible. Any value between 1 and 0 indicates how transparent the element is.
Browser Compatibility
opacity is the CSS3 element best supported by browsers...except IE, of course! CSS3 Transparency (Example 1: Layers)

The transparency example above uses the following style:

p.opacityL1 { background:#036; opacity:0.2; width:575px; height:20px; } p.opacityL2 { background:#036; opacity:0.4; width:575px; height:20px; } p.opacityL3 { background:#036; opacity:0.6; width:575px; height:20px; } p.opacityL4 { background:#036; opacity:0.8; width:575px; height:20px; } p.opacityL5 { background:#036; opacity:1.0; width:575px; height:20px; }

Browser support:

Firefox (3.05…)

Google Chrome (1.0.154…)

Google Chrome(2.0.156…)

Internet Explorer(IE7, IE8 RC1)

Opera(9.6…)

Safari(3.2.1 windows…) CSS 3 Transparent (Example 2: Picture)

We can also use a transparency effect with different levels of transparency on the image, like in the example above. A cool application is to apply opacity to :hover to achieve a link mouseover effect.

img.opacity1 { opacity:0.25; width:150px; height:100px; } img.opacity2 { opacity:0.50; width:150px; height:100px; } img.opacity3 { opacity:0.75; width:150px; height:100px; }

Browser support:

Firefox(3.05…)

Google Chrome(1.0.154…)

Google Chrome(2.0.156…)

Internet Explorer(IE7, IE8 RC1)

Opera( 9.6…)

Safari(3.2.1 windows…)

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Related articles:

CSS setting an element to be translucent

Example of using RGBa to adjust transparency in CSS3

Complete code to implement CSS3 opacity