# Progression 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 Progression
```

Enumerates the possible colour interpolations for a gradient.

## Values

| Name | Value | Description |
| --- | --- | --- |
| Nearest | 1 | Gradient colour is derived from the nearest grip. |
| Immediate | 2 | Gradient colour is derived from the immediate grip to the left. |
| Linear | 10 | Gradient colour is interpolated linearly between adjacent grips. |
| Smooth | 11 | Gradient colour is interpolated using a smooth in/out polynomial between adjacent grips. |
| Cubic | 20 | Gradient colour is interpolated using a cubic polynomial through all grips. |
| Cyclic | 21 | Gradient colour is interpolated using a cubic polynomial through all grips, where the derivatives at the start and at the end of the gradient are kept continuous. |
| Gaussian | 30 | Gradient colour is a weighted average of all grips. |