rgba()
The rgba() functional notation expresses a color according to its red, green, and blue components. An optional alpha component represents the color's transparency.
Note: CSS Colors Level 4 allows for space-separated in addition to comma-separated values.
Syntax
rgba(255,255,255,.5) /* white with 50% opacity */ rgba(255 255 255 / 0.5); /* CSS Colors 4 space-separated values */
Values
- Functional notation:
rgb[a](R, G, B[, A]) -
R(red),G(green), andB(blue) can be either<number>s or<percentage>s, where the number255corresponds to100%.A(alpha) can be a<number>between0and1, or a<percentage>, where the number1corresponds to100%(full opacity). - Functional notation:
rgb[a](R G B[ / A]) -
CSS Colors Level 4 adds support for space-separated values in the functional notation.
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
rgba() |
65 |
79 |
52 |
No |
52 |
12.1 |
65 |
65 |
52 |
47 |
12.2 |
9.0 |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
rgba() |
1 |
12 |
3 |
9 |
10 |
3.1 |
≤37 |
18 |
4 |
10.1 |
2 |
1.0 |
Space-separated values
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https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/rgba()