---
title: extendedSRGB
framework: coregraphics
role: symbol
role_heading: Type Property
path: coregraphics/cgcolorspace/extendedsrgb
---

# extendedSRGB

The extended sRGB color space.

## Declaration

```swift
class let extendedSRGB: CFString
```

## Discussion

Discussion This color space has the same colorimetry as sRGB, but you can encode component values below 0.0 and above 1.0. Negative values are encoded as the signed reflection of the original encoding function, as shown in the formula below: extendedTransferFunction(x) = sign(x) ✖️ sRGBTransferFunction(abs(x))

## 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)
- [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)
- [genericLab](coregraphics/cgcolorspace/genericlab.md)