---
title: "EmitterColorOp"
docs: "Phaser v3.90.0"
url: https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emittercolorop
site: Phaser - https://phaser.io
---

> This page is about the open-source Phaser framework, for writing a game's code by hand. To make a game with AI, use Phaser AE (https://phaser.io/): the desk's tools work with Web MCP, and the CLI works with your own coding agent. See "For AI agents: Phaser AE" at the end of this page.

# EmitterColorOp

This class is responsible for taking control over the color property

in the Particle class and managing its emission and updating functions.



See the `ParticleEmitter` class for more details on emitter op configuration.

**Constructor**

`new EmitterColorOp(key)`

**Parameters**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| key | string | No | The name of the property. |

---


**Scope**: static


**Extends**

> [Phaser.GameObjects.Particles.EmitterOp](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md)  



> Source: [src/gameobjects/particles/EmitterColorOp.js#L14](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L14)  
Since: 3.60.0

## Inherited Members


**From [Phaser.GameObjects.Particles.EmitterOp](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md):**


 - [active](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#active)
 - [counter](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#counter)
 - [current](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#current)
 - [defaultValue](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#defaultvalue)
 - [direction](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#direction)
 - [ease](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#ease)
 - [emitOnly](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#emitonly)
 - [end](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#end)
 - [interpolation](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#interpolation)
 - [method](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#method)
 - [onEmit](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#onemit)
 - [onUpdate](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#onupdate)
 - [propertyKey](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#propertykey)
 - [propertyValue](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#propertyvalue)
 - [start](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#start)
 - [steps](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#steps)
 - [yoyo](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#yoyo)




---

## Public Members

### b

#### b: Array.\<number>


**Description:**

An array containing the blue color values.



Populated during the `setMethods` method.


> Source: [src/gameobjects/particles/EmitterColorOp.js#L65](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L65)  
Since: 3.60.0


---

### g

#### g: Array.\<number>


**Description:**

An array containing the green color values.



Populated during the `setMethods` method.


> Source: [src/gameobjects/particles/EmitterColorOp.js#L54](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L54)  
Since: 3.60.0


---

### r

#### r: Array.\<number>


**Description:**

An array containing the red color values.



Populated during the `setMethods` method.


> Source: [src/gameobjects/particles/EmitterColorOp.js#L43](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L43)  
Since: 3.60.0


---

## Inherited Methods


**From [Phaser.GameObjects.Particles.EmitterOp](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md):**


 - [defaultEmit](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#defaultemit)
 - [defaultUpdate](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#defaultupdate)
 - [destroy](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#destroy)
 - [has](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#has)
 - [hasBoth](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#hasboth)
 - [hasEither](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#haseither)
 - [loadConfig](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#loadconfig)
 - [onChange](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#onchange)
 - [proxyEmit](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#proxyemit)
 - [proxyUpdate](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#proxyupdate)
 - [randomRangedIntEmit](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#randomrangedintemit)
 - [randomRangedValueEmit](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#randomrangedvalueemit)
 - [randomStaticValueEmit](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#randomstaticvalueemit)
 - [staticValueEmit](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#staticvalueemit)
 - [staticValueUpdate](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#staticvalueupdate)
 - [steppedEmit](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#steppedemit)
 - [toJSON](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emitterop.md#tojson)




---

## Public Methods

### easedValueEmit

#### \<instance> easedValueEmit(particle, key)


**Description:**

An `onEmit` callback for an eased property.



It prepares the particle for easing by [Phaser.GameObjects.Particles.EmitterColorOp#easeValueUpdate](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emittercolorop.md#easeValueUpdate).

**Parameters:**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| particle | [Phaser.GameObjects.Particles.Particle](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-particle.md) | No | The particle. |
| key | string | No | The name of the property. |


**Overrides:** Phaser.GameObjects.Particles.EmitterOp#easedValueEmit


**Returns:** number - {@link Phaser.GameObjects.Particles.EmitterColorOp#start}, as the new value of the property.


> Source: [src/gameobjects/particles/EmitterColorOp.js#L157](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L157)  
Since: 3.60.0


---

### easeValueUpdate

#### \<instance> easeValueUpdate(particle, key, t)


**Description:**

An `onUpdate` callback that returns an eased value between the

[Phaser.GameObjects.Particles.EmitterColorOp#start](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emittercolorop.md#start) and [Phaser.GameObjects.Particles.EmitterColorOp#end](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emittercolorop.md#end)

range.

**Parameters:**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| particle | [Phaser.GameObjects.Particles.Particle](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-particle.md) | No | The particle. |
| key | string | No | The name of the property. |
| t | number | No | The current normalized lifetime of the particle, between 0 (birth) and 1 (death). |


**Overrides:** Phaser.GameObjects.Particles.EmitterOp#easeValueUpdate


**Returns:** number - The new value of the property.


> Source: [src/gameobjects/particles/EmitterColorOp.js#L177](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L177)  
Since: 3.60.0


---

### getMethod

#### \<instance> getMethod()


**Description:**

Checks the type of `EmitterOp.propertyValue` to determine which

method is required in order to return values from this op function.


**Overrides:** Phaser.GameObjects.Particles.EmitterOp#getMethod


**Returns:** number - A number between 0 and 9 which should be passed to `setMethods`.


> Source: [src/gameobjects/particles/EmitterColorOp.js#L77](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L77)  
Since: 3.60.0


---

### setEase

#### \<instance> setEase(ease)


**Description:**

Sets the Ease function to use for Color interpolation.

**Parameters:**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| ease | string | No | The string-based name of the Ease function to use. |


> Source: [src/gameobjects/particles/EmitterColorOp.js#L142](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L142)  
Since: 3.60.0


---

### setMethods

#### \<instance> setMethods()


**Description:**

Sets the EmitterColorOp method values, if in use.


**Overrides:** Phaser.GameObjects.Particles.EmitterOp#setMethods


**Returns:** [Phaser.GameObjects.Particles.EmitterColorOp](https://phaser.io/oss/docs/api-documentation/3.90.0/class/gameobjects-particles-emittercolorop.md) - This Emitter Op object.


> Source: [src/gameobjects/particles/EmitterColorOp.js#L91](https://github.com/phaserjs/phaser/blob/v3.90.0/src/gameobjects/particles/EmitterColorOp.js#L91)  
Since: 3.60.0


---

---

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Read any page of this site as Markdown by adding `.md` to its URL (the home page is https://phaser.io/index.md), or by asking for `text/markdown`. The index for agents is https://phaser.io/llms.txt. On the site's pages, the browser's Web MCP also offers `phaser_ae_guide`, `read_page_as_markdown` and `open_phaser_ae`.