# Space3 enum

Namespace: [Grasshopper2.Types.Colour](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.types.colour.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
public enum Space3
```

A subset of the [Space](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.colour.space.md) enumeration listing only mathemtical, 3-channel colours.

## Values

| Name | Value | Description |
| --- | --- | --- |
| Rgb | 0 | Standard (Red, Green, Blue) colour space. The sRGB space is gamma corrected. |
| RgbLinear | 1 | Linear (Red, Green, Blue) space without the standard gamma correction. |
| Hsl | 2 | Standard (Hue, Saturation, Luminance) space. Using a common but naïve luminance metric. |
| Hsv | 3 | Standard (Hue, Saturation, Value) space. Using a naïve brightness metric. Also sometimes called HSB space. |
| Hsp | 4 | Grasshopper specific (Hue, Saturation, Luminance) space with a more advanced luminance metric. |
| Cmy | 10 | Standard (Cyan, Magenta, Yellow) space. |
| Lab | 20 | L*a*b* colour space. |
| Xyz | 21 | X*yz colour space. |
| Yxy | 22 | Yxy colour space, also known as the Chromaticity Diagram. |
| Oklab | 23 | Oklab perceptual colour space. |