<!--
{
  "availability" : [
    "iOS: 2.0.0 -",
    "iPadOS: 2.0.0 -",
    "macCatalyst: 13.1.0 -",
    "tvOS: -",
    "visionOS: 1.0.0 -",
    "watchOS: 2.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "UIKit",
  "identifier" : "/documentation/UIKit/UIColor/withAlphaComponent(_:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "UIKit"
    ],
    "preciseIdentifier" : "c:objc(cs)UIColor(im)colorWithAlphaComponent:"
  },
  "title" : "withAlphaComponent(_:)"
}
-->

# withAlphaComponent(_:)

Creates a color object that has the same color space and component values as the receiver, but has the specified alpha component.

```
func withAlphaComponent(_ alpha: CGFloat) -> UIColor
```

## Parameters

`alpha`

The opacity value of the new color object, specified as a value from 0.0 to 1.0. Alpha values below 0.0 are interpreted as 0.0, and values above 1.0 are interpreted as 1.0.

## Return Value

The new `UIColor` object.

## Discussion

A subclass with explicit opacity components should override this method to return a color with the specified alpha.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)