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#rrggbbaa hex color notation

The W3C Extended Color Module CSS4 is a supplemental document to CSS3. It defines new 4 character hexadecimal notation and 8 character hexadecimal notation for colors, along with the opacity level of css-rrggbbaa.

Last updated on : 2026-02-09

Browser Versions

IE

Edge

Firefox

Chrome

Safari

Opera

5.5 - 11

12 - 18

79 - 144

2 - 48

49 - 150

4 - 61

62 - 147

3.2 - 9

10 - 26.3

9.5 - 51

52 - 125

Fully Supported

Partially

No Support

Browser Compatibility

#rrggbbaa hex color notation on IE is not supported on any IE versions.

#rrggbbaa hex color notation on Edge is fully supported on 79-144, and not supported on 12-18 Edge versions.

#rrggbbaa hex color notation on Firefox is fully supported on 49-150, and not supported on 2-48 Firefox versions.

#rrggbbaa hex color notation on Chrome is fully supported on 62-147, and not supported on 4-61 Chrome versions.

#rrggbbaa hex color notation on Safari is fully supported on 10-26.3, and not supported on 3.2-9 Safari versions.

#rrggbbaa hex color notation on Opera is fully supported on 52-125, and not supported on 9.5-51 Opera versions.

#rrggbbaa hex color notation on Safari on iOS is fully supported on 10-26.3, and not supported on 3.2-9 Safari on iOS versions.

#rrggbbaa hex color notation on Android Browser is fully supported on 97-144, and not supported on 2.3-4 Android Browser versions.

#rrggbbaa hex color notation on Opera Mobile is fully supported on 64-80, and not supported on 10-12 Opera Mobile versions.

#rrggbbaa hex color notation on Chrome for Android is fully supported on all Chrome for Android versions.

#rrggbbaa hex color notation on Firefox for Android is fully supported on all Firefox for Android versions.

#rrggbbaa hex color notation on Samsung Internet is fully supported on 8.2-29, and not supported on 4-7.2 Samsung Internet versions.

Browser Support for #rrggbbaa hex color notation

#rrggbbaa hex color notation on Chrome

#rrggbbaa hex color notation on Safari

#rrggbbaa hex color notation on Firefox

#rrggbbaa hex color notation on Internet Explorer

#rrggbbaa hex color notation on Opera

#rrggbbaa hex color notation on Edge

References

Data sourced from

92

High

Overall Browser Compatibility Score

Note:#rrggbbaa hex color notation shows a browser compatibility score of 92. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.

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