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Chapter 13. Color > opacity Property

13.3. opacity Property

By default, all objects on a Web page are fully opaque. The opacity property would give Web authors the ability to change that, setting a value that tells the browser how opaque an object would be, allowing for interesting visual blending effects.

opacity takes a decimal value ranging between 0.0 (fully transparent) and 1.0 (fully opaque) — any value greater or lower than this is clipped to stay within this range. The opacity value is applied across the entire element — any outline, border or background that may be associated with a selected element is rendered using the same opacity value.


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