alpha()
The
alpha() CSS function computes a relative color value by adjusting the opacity of an origin color.
Baseline Status:
Achieved Newly Available on Sep 14, 2026 across core engines.
Desktop Browser Engine Support
Google Chrome
152
Supported
Mozilla Firefox
155
Supported
Apple Safari
27
Supported
Microsoft Edge
152
Supported
Mobile Browser Engine Support
Chrome Android
152
Firefox Android
155
Safari iOS
27
Specifications and References
MDN Browser Compat Data Keys:
id: alpha