---
title: itur_2020_HLG
framework: coregraphics
role: symbol
role_heading: Type Property
path: coregraphics/cgcolorspace/itur_2020_hlg
---

# itur_2020_HLG

The recommendation of the International Telecommunication Union (ITU) Radiocommunication sector for the BT.2020 color space, with the HLG transfer function.

## Declaration

```swift
class let itur_2020_HLG: CFString
```

## Discussion

Discussion This color space has the same colorimetry as itur_2020, but uses the Hybrid Log-Gamma (HLG) transfer function. Pixel values should be between 0.0 and 12.0. See the current active version of the BT.2100 recommendation on the ITU website (https://www.itu.int/).

## See Also

### Accessing System-Defined Color Spaces

- [displayP3](coregraphics/cgcolorspace/displayp3.md)
- [displayP3_HLG](coregraphics/cgcolorspace/displayp3_hlg.md)
- [displayP3_PQ_EOTF](coregraphics/cgcolorspace/displayp3_pq_eotf.md)
- [extendedLinearDisplayP3](coregraphics/cgcolorspace/extendedlineardisplayp3.md)
- [sRGB](coregraphics/cgcolorspace/srgb.md)
- [linearSRGB](coregraphics/cgcolorspace/linearsrgb.md)
- [extendedSRGB](coregraphics/cgcolorspace/extendedsrgb.md)
- [extendedLinearSRGB](coregraphics/cgcolorspace/extendedlinearsrgb.md)
- [genericGrayGamma2_2](coregraphics/cgcolorspace/genericgraygamma2_2.md)
- [extendedGray](coregraphics/cgcolorspace/extendedgray.md)
- [linearGray](coregraphics/cgcolorspace/lineargray.md)
- [extendedLinearGray](coregraphics/cgcolorspace/extendedlineargray.md)
- [genericCMYK](coregraphics/cgcolorspace/genericcmyk.md)
- [genericRGBLinear](coregraphics/cgcolorspace/genericrgblinear.md)
- [genericXYZ](coregraphics/cgcolorspace/genericxyz.md)