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# init(red:green:blue:alpha:)

Creates a color object with the specified red, green, blue, and alpha channel values.

```
init(red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat)
```

## Parameters

`red`

The red channel value. If the value is outside of the range `0–1.0`, the extended sRGB color space is used.

`green`

The green channel value. If the value is outside of the range `0–1.0`, the extended sRGB color space is used.

`blue`

The blue channel value. If the value is outside of the range `0–1.0`, the extended sRGB color space is used.

`alpha`

The alpha (opacity), specified as a value from `0-1.0`. Alpha values below `0` are interpreted as `0.0`, and values above `1.0` are interpreted as `1.0`.

## Discussion

This method accepts extended color component values. If the red, green, blue, or alpha values are outside of the `0-1.0` range, the method creates a color in the extended range color space. This method is provided for easier reuse of code that uses <doc://com.apple.documentation/documentation/UIKit/UIColor> in iOS.

Where possible, it is preferable to specify the colorspace explicitly using the [`init(srgbRed:green:blue:alpha:)`](/documentation/AppKit/NSColor/init(srgbRed:green:blue:alpha:)-9oz51) or [`init(genericGamma22White:alpha:)`](/documentation/AppKit/NSColor/init(genericGamma22White:alpha:)) method.

---

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