# PaletteMergeBehaviour 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 PaletteMergeBehaviour
```

Enumerates some default merge options for named palettes.

## Values

| Name | Value | Description |
| --- | --- | --- |
| Throw | 0 | Exceptions are thrown in case of name collisions. |
| OmitCollisions | 1 | Omit all colliding colours. |
| UseFirst | 2 | Earlier names beat later ones. |
| UseLast | 3 | Later names beat earlier ones. |
| Average | 4 | Colliding names have their colours averaged. This type of merge erases Source and Notes fields, but combines adjectives. |
| Prompt | 5 | Display a user prompt for each colour. |