---
title: blue
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtltextureswizzlechannels/blue
---

# blue

The data copied to the third output channel.

## Declaration

```swift
var blue: MTLTextureSwizzle
```

## See Also

### Specifying swizzle values

- [red](metal/mtltextureswizzlechannels/red.md)
- [green](metal/mtltextureswizzlechannels/green.md)
- [alpha](metal/mtltextureswizzlechannels/alpha.md)