---
title: r1
framework: swiftui
role: symbol
role_heading: Instance Property
path: swiftui/colormatrix/r1
---

# r1

## Declaration

```swift
var r1: Float
```

## See Also

### First column

- [g1](swiftui/colormatrix/g1.md)
- [b1](swiftui/colormatrix/b1.md)
- [a1](swiftui/colormatrix/a1.md)