CSS rgba() Function
Example
Define different RGB colors with opacity (RGBA):
#p1 {background-color:rgba(255,0,0,0.3);} /* red with opacity*/
#p2 {background-color:rgba(0,255,0,0.3);} /* green with opacity */
#p3 {background-color:rgba(0,0,255,0.3);} /* blue with opacity */
Try it Yourself »
Definition and Usage
The rgba() function define colors using the Red-green-blue-alpha (RGBA) model.
RGBA color values are an extension of RGB color values with an alpha channel - which specifies the opacity of the color.
| Version: | CSS3 |
|---|
Browser Support
The numbers in the table specify the first browser version that fully supports the function.
| Function | |||||
|---|---|---|---|---|---|
| rgba() | 1.0 | 9.0 | 3.0 | 3.1 | 10.0 |
CSS Syntax
rgba(red, green, blue, alpha)
| Value | Description |
|---|---|
| red | Defines the intensity of red as an integer between 0 and 255, or as a percentage value between 0% and 100% |
| green | Defines the intensity of green as an integer between 0 and 255, or as a percentage value between 0% and 100% |
| blue | Defines the intensity of blue as an integer between 0 and 255, or as a percentage value between 0% and 100% |
| alpha | Defines the opacity as a number between 0.0 (fully transparent) and 1.0 (fully opaque) |