---
title: MTLTextureSwizzle.blue
framework: metal
role: symbol
role_heading: Case
path: metal/mtltextureswizzle/blue
---

# MTLTextureSwizzle.blue

The blue channel of the source pixel is copied to the destination channel.

## Declaration

```swift
case blue
```

## See Also

### Specifying swizzle channels

- [MTLTextureSwizzle.alpha](metal/mtltextureswizzle/alpha.md)
- [MTLTextureSwizzle.green](metal/mtltextureswizzle/green.md)
- [MTLTextureSwizzle.red](metal/mtltextureswizzle/red.md)
- [MTLTextureSwizzle.one](metal/mtltextureswizzle/one.md)
- [MTLTextureSwizzle.zero](metal/mtltextureswizzle/zero.md)