---
title: "ColorBand"
docs: "Phaser v4.1.0"
url: https://phaser.io/oss/docs/api-documentation/class/display-colorband
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.

# ColorBand

The ColorBand class represents a transition from one color to another. It is used in a {@see Phaser.Display.ColorRamp}, and forms the basis of a {@see Phaser.GameObjects.Gradient}.

ColorBand can control the transition by setting a middle point, a color space for blending, and an interpolation style.

This class also records `start` and `end` points for use in a ramp. These indicate its position within the ramp.

Colors are handled unpremultiplied, so RGB values may be larger than alpha.

**Constructor**

`new ColorBand([config])`

**Parameters**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| config | [Phaser.Types.Display.ColorBandConfig](https://phaser.io/oss/docs/api-documentation/typedef/types-display.md#ColorBandConfig) | Yes | The configuration to use for the band. |

---


**Scope**: static

> Source: [src/display/ColorBand.js#L13](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L13)  
Since: 4.0.0

## Public Members

### colorEnd

#### colorEnd: [Phaser.Display.Color](https://phaser.io/oss/docs/api-documentation/namespace/display-color.md)


**Description:**

The color at the end of the color band.


> Source: [src/display/ColorBand.js#L60](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L60)  
Since: 4.0.0


---

### colorSpace

#### colorSpace: number


**Description:**

The color space where interpolation should be done. This can be one of the following codes:

- 0: RGBA - channels are blended directly.

  This can produce perceptually inaccurate results, as blending

  in RGB space does not account for how humans perceive color.

- 1: HSVA_NEAREST - colors are blended in HSVA space,

  better preserving saturation and lightness.

  The hue is blended with the shortest angle, e.g. red and blue

  blend via purple, not green.

- 2: HSVA_PLUS - as HSVA_NEAREST, but hue angle always increases.

- 3: HSVA_MINUS - as HSVA_NEAREST, but hue angle always decreases.


> Source: [src/display/ColorBand.js#L135](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L135)  
Since: 4.0.0


---

### colorStart

#### colorStart: [Phaser.Display.Color](https://phaser.io/oss/docs/api-documentation/namespace/display-color.md)


**Description:**

The color at the start of the color band.


> Source: [src/display/ColorBand.js#L51](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L51)  
Since: 4.0.0


---

### end

#### end: number


**Description:**

The end point of this band within a ColorRamp. This value should be normalized within the ramp, between 0 (ramp start) and 1 (ramp end).


> Source: [src/display/ColorBand.js#L98](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L98)  
Since: 4.0.0


---

### interpolation

#### interpolation: number


**Description:**

The color interpolation. This can be one of the following codes:

- 0: LINEAR - a straight blend.

- 1: CURVED - color changes quickly at start and end,

  flattening in the middle. Good for convex surfaces.

- 2: SINUSOIDAL - color changes quickly in the middle,

  flattening at start and end. Good for smooth transitions.

- 3: CURVE_START - color changes quickly at the start,

  flattening at the end.

- 4: CURVE_END - color changes quickly at the end,

  flattening at the start.

Modes 2, 3, and 4 use the circular easing function directly. Mode 1 uses a related custom formula based on the unit circle.


> Source: [src/display/ColorBand.js#L111](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L111)  
Since: 4.0.0


---

### isColorBand

#### isColorBand: boolean


**Description:**

Identifies this object as a ColorBand. This property is read-only and must not be modified.


> Source: [src/display/ColorBand.js#L39](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L39)  
Since: 4.0.0


---

### middle

#### middle: number


**Description:**

The middle point of this band within a ColorRamp. This value should be normalized within the band, between 0 (band start) and 1 (band end). Middle point alters the shape of the color interpolation.

Mathematically, the gradient should be 0.5 at the middle. We use a gamma curve to adjust the gradient. Thus, `0.5 = middle^gamma`. By the properties of logarithms, therefore, `gamma = log base middle of 0.5`.


> Source: [src/display/ColorBand.js#L80](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L80)  
Since: 4.0.0


---

### start

#### start: number


**Description:**

The start point of this band within a ColorRamp. This value should be normalized within the ramp, between 0 (ramp start) and 1 (ramp end).


> Source: [src/display/ColorBand.js#L69](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L69)  
Since: 4.0.0


---

## Public Methods

### getColor

#### \<instance> getColor(index)


**Description:**

Returns the blended color at a normalized position within this band. The middle point gamma curve, interpolation mode, and color space are all applied before blending between `colorStart` and `colorEnd`.

**Parameters:**
| name | type | optional | description |
| ---- | ---- | -------- | ----------- |
| index | number | No | The normalized position within the band, where 0 is the band start and 1 is the band end. |


**Returns:** [Phaser.Types.Display.ColorObject](https://phaser.io/oss/docs/api-documentation/typedef/types-display.md#ColorObject) - The blended color at that position.


> Source: [src/display/ColorBand.js#L225](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L225)  
Since: 4.0.0


---

### setColors

#### \<instance> setColors([start], [end])


**Description:**

Set the colors of the band, from a variety of color formats.

- A number is expected to be a 24 or 32 bit RGB or ARGB value.

- A string is expected to be a hex code.

- An array of numbers is expected to be RGB or RGBA in the range 0-1.

- A Color object can be used.

**Parameters:**
| name | type | optional | default | description |
| ---- | ---- | -------- | ------- | ----------- |
| start | number \| string | Array.\<number> | [Phaser.Display.Color](https://phaser.io/oss/docs/api-documentation/namespace/display-color.md) | Yes | "0x000000" | The color at the start of the band. |
| end | number \| string | Array.\<number> | [Phaser.Display.Color](https://phaser.io/oss/docs/api-documentation/namespace/display-color.md) | Yes |  | The color at the end of the band. If not specified, equals `start`. |


**Returns:** [Phaser.Display.ColorBand](https://phaser.io/oss/docs/api-documentation/class/display-colorband.md) - This ColorBand.


> Source: [src/display/ColorBand.js#L159](https://github.com/phaserjs/phaser/blob/v4.1.0/src/display/ColorBand.js#L159)  
Since: 4.0.0


---

---

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