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# fill(_:blendMode:)

Paints a rectangular area with the currently selected fill color using the supplied blend mode.

```
func fill(_ rect: CGRect, blendMode: CGBlendMode)
```

## Parameters

`rect`

A rectangle, specified in the Core Graphics coordinate space with values in points.

`blendMode`

The blend mode applied to the fill operation.

## Discussion

Before calling this method, select the fill color with the [`setFill()`](/documentation/UIKit/UIColor/setFill()) method on an instance of [`UIColor`](/documentation/UIKit/UIColor).

The blend mode specifies how the new value for a given pixel is calculated, given the existing pixel value and the currently selected fill color. For more information on the blend modes available, see <doc://com.apple.documentation/documentation/CoreGraphics/CGBlendMode>.

For an example of how to use this method, see [`Using blend mode`](/documentation/UIKit/UIGraphicsImageRenderer#Using-blend-mode) in [`UIGraphicsImageRenderer`](/documentation/UIKit/UIGraphicsImageRenderer).

---

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