Quick Reference
An RGBA color value is specified with the rgba() function, which has the following syntax: rgba(red, green, blue, alpha).
Each parameter (red, green, and blue) defines the intensity of the color and can be an integer between 0 and 255, or a percentage value (from 0% to 100%). The alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque).
div {
color: rgb(255, 0, 0, 0.5); /* red with 0.5 opacity */
}div {
color: rgb(100%, 0%, 0%, 0.5); /* red with 0.5 opacity */
}Syntax
rgb(red, green, blue, alpha)Values
| 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 blue as an integer between 0 and 255, or as a percentage value between 0% and 100% |
| blue | Defines the intensity of green 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) |
CSS Notes:
- The “inherit”, “initial” and “unset” keywords can be used with any CSS property to set its value
- In CSS there are many ways to express a color value in a property
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.