Note that the last letter of the four in the rgba( ) color specification is "a". It refers to "alpha". This term is often used to indicate the amount of opacity. In the following examples the value represents a percentage of opacity:
|
||
|---|---|---|
| Blue
100% opaque
CSS color specification: color: rgba (0, 0, 255, 1); |
Blue with 40% opacity
CSS color specification: color:rgba (0, 0, 255, .4;) |
Blue with 20%
opacity
CSS color specification color: rgba (0, 0, 255, .2); |
| CSS | CSS | CSS |